diff --git a/friendica-clean-database.sh b/friendica-clean-database.sh
index e92e811..474c5f6 100755
--- a/friendica-clean-database.sh
+++ b/friendica-clean-database.sh
@@ -4,17 +4,11 @@ limit=1000
 folder=/var/www/friendica
 user=friendica
 phpversion=php8.2
-tmpfile=/tmp/fcb
 dbengine=mariadb
 db=friendica
 dboptimizer=mariadboptimize
 
 bash -c "cd ${folder} && sudo -u ${user} ${phpversion} bin/console.php maintenance 1 \"Database maintenance\"" #&> /dev/null;
-if [[ -f "${tmpfile}" ]]; then
-	rm "${tmpfile}" && touch "${tmpfile}"
-else
-	touch "${tmpfile}"
-fi
 
 echo "tmp_post_origin_deleted"
 tmp_post_origin_deleted_q="${limit}"
@@ -23,7 +17,7 @@ until [[ "${tmp_post_origin_deleted_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_origin_deleted_q=0
 	while read -r uri_id uid; do
-		if [[ -n "${uri_id}" && -n "${uid}" ]]; then
+		if [[ -s "${uri_id}" && -s "${uid}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-origin\` WHERE \`parent-uri-id\` = ${uri_id} AND \`uid\` = ${uid}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -39,6 +33,7 @@ until [[ "${tmp_post_origin_deleted_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_origin_deleted_q} item(s) deleted until ${tmp_post_origin_deleted_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_user_deleted"
 tmp_post_user_deleted_q="${limit}"
@@ -47,7 +42,7 @@ until [[ "${tmp_post_user_deleted_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_user_deleted_q=0
 	while read -r uri_id; do
-		if [[ -n "${uri_id}" ]]; then
+		if [[ -s "${uri_id}" ]]; then
 			tmp_post_user_deleted_q=$((tmp_post_user_deleted_q + 1))
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-user\` WHERE \`uri-id\` = ${uri_id}" &
@@ -63,6 +58,7 @@ until [[ "${tmp_post_user_deleted_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_user_deleted_q} item(s) deleted until ${tmp_post_user_deleted_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_uri_id_not_in_post_user"
 tmp_post_uri_id_not_in_post_user_q="${limit}"
@@ -71,7 +67,7 @@ until [[ "${tmp_post_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_uri_id_not_in_post_user_q=0
 	while read -r uri_id; do
-		if [[ -n "${uri_id}" ]]; then
+		if [[ -s "${uri_id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post\` WHERE \`uri-id\` = ${uri_id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -86,6 +82,7 @@ until [[ "${tmp_post_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_uri_id_not_in_post_user_q} item(s) deleted until ${tmp_post_uri_id_not_in_post_user_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_content_uri_id_not_in_post_user"
 tmp_post_content_uri_id_not_in_post_user_q="${limit}"
@@ -94,7 +91,7 @@ until [[ "${tmp_post_content_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_content_uri_id_not_in_post_user_q=0
 	while read -r uri_id; do
-		if [[ -n "${uri_id}" ]]; then
+		if [[ -s "${uri_id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-content\` WHERE \`uri-id\` = ${uri_id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -109,6 +106,7 @@ until [[ "${tmp_post_content_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_content_uri_id_not_in_post_user_q} item(s) deleted until ${tmp_post_content_uri_id_not_in_post_user_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_thread_uri_id_not_in_post_user"
 tmp_post_thread_uri_id_not_in_post_user_q="${limit}"
@@ -117,7 +115,7 @@ until [[ "${tmp_post_thread_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_thread_uri_id_not_in_post_user_q=0
 	while read -r uri_id; do
-		if [[ -n "${uri_id}" ]]; then
+		if [[ -s "${uri_id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-thread\` WHERE \`uri-id\` = ${uri_id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -133,6 +131,7 @@ until [[ "${tmp_post_thread_uri_id_not_in_post_user_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_thread_uri_id_not_in_post_user_q} item(s) deleted until ${tmp_post_thread_uri_id_not_in_post_user_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_user_uri_id_not_in_post"
 tmp_post_user_uri_id_not_in_post_q="${limit}"
@@ -141,7 +140,7 @@ until [[ "${tmp_post_user_uri_id_not_in_post_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_post_user_uri_id_not_in_post_q=0
 	while read -r uri_id; do
-		if [[ -n "${uri_id}" ]]; then
+		if [[ -s "${uri_id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-user\` WHERE \`uri-id\` = ${uri_id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -157,6 +156,7 @@ until [[ "${tmp_post_user_uri_id_not_in_post_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_user_uri_id_not_in_post_q} item(s) deleted until ${tmp_post_user_uri_id_not_in_post_current_uri_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_item_uri_not_in_valid_post_thread"
 tmp_item_uri_not_in_valid_post_thread_q="${limit}"
@@ -165,7 +165,7 @@ until [[ "${tmp_item_uri_not_in_valid_post_thread_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_item_uri_not_in_valid_post_thread_q=0
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`item-uri\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -190,6 +190,7 @@ until [[ "${tmp_item_uri_not_in_valid_post_thread_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_item_uri_not_in_valid_post_thread_q} item(s) deleted until ${tmp_item_uri_not_in_valid_post_thread_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_item_uri_not_in_valid_post_user"
 tmp_item_uri_not_in_valid_post_user_q="${limit}"
@@ -198,7 +199,7 @@ until [[ "${tmp_item_uri_not_in_valid_post_user_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_item_uri_not_in_valid_post_user_q=0
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`item-uri\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -216,6 +217,7 @@ until [[ "${tmp_item_uri_not_in_valid_post_user_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_item_uri_not_in_valid_post_user_q} item(s) deleted until ${tmp_item_uri_not_in_valid_post_user_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_attach_not_in_post_media"
 tmp_attach_not_in_post_media_q="${limit}"
@@ -224,7 +226,7 @@ until [[ "${tmp_attach_not_in_post_media_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_attach_not_in_post_media_q=0
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`attach\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -240,6 +242,7 @@ until [[ "${tmp_attach_not_in_post_media_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_attach_not_in_post_media_q} item(s) deleted until ${tmp_attach_not_in_post_media_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_item_uri_not_valid"
 tmp_item_uri_not_valid_q="${limit}"
@@ -250,7 +253,7 @@ until [[ "${tmp_item_uri_not_valid_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_item_uri_not_valid_q=0
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`item-uri\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -284,6 +287,7 @@ until [[ "${tmp_item_uri_not_valid_q}" -lt "${limit}" ]]; do
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_item_uri_not_valid_q} item(s) deleted until ${tmp_item_uri_not_valid_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_item_uri_duplicate"
 tmp_item_uri_duplicate_q="${limit}"
@@ -292,7 +296,7 @@ until [[ "${tmp_item_uri_duplicate_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	tmp_item_uri_duplicate_q=0
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`item-uri\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
@@ -302,10 +306,12 @@ until [[ "${tmp_item_uri_duplicate_q}" -lt "${limit}" ]]; do
 			tmp_item_uri_duplicate_current_id="${id}"
 		fi
 	done < <("${dbengine}" "${db}" -N -B -q -e \
-		"SELECT t1.\`id\` FROM \`item-uri\` t1 INNER JOIN \`item-uri\` t2 WHERE t1.\`id\` > ${tmp_item_uri_duplicate_current_id} AND t1.\`id\` < t2.\`id\` AND t1.\`uri\` = t2.\`uri\` LIMIT ${limit}")
+		"SELECT t1.\`id\` FROM \`item-uri\` t1 INNER JOIN \`item-uri\` t2 WHERE t1.\`id\` > ${tmp_item_uri_duplicate_current_id} \
+			AND t1.\`id\` < t2.\`id\` AND t1.\`uri\` = t2.\`uri\` LIMIT ${limit}")
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_item_uri_duplicate_q} item(s) deleted until ${tmp_item_uri_duplicate_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_media_duplicate"
 tmp_post_media_duplicate_q="${limit}"
@@ -313,44 +319,45 @@ tmp_post_media_duplicate_current_id=0
 until [[ "${tmp_post_media_duplicate_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
 	while read -r id; do
-		if [[ -n "${id}" ]]; then
+		if [[ -s "${id}" ]]; then
 			"${dbengine}" "${db}" -N -B -q -e \
 				"DELETE FROM \`post-media\` WHERE \`id\` = ${id}" &
 			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
 				wait -n
 			fi
-			echo "${id}"
 			tmp_post_media_duplicate_q=$((tmp_post_media_duplicate_q + 1))
 			tmp_post_media_duplicate_current_id="${id}"
 		fi
 	done < <("${dbengine}" "${db}" -N -B -q -e \
-		"SELECT u1.\`id\` FROM \`post-media\` u1 INNER JOIN \`post-media\` u2 WHERE u1.\`id\` > ${tmp_post_media_duplicate_current_id} AND u1.\`id\` < u2.\`id\` AND u1.\`uri-id\` = u2.\`uri-id\` AND u1.\`url\`= u2.\`url\` LIMIT ${limit}")
+		"SELECT u1.\`id\` FROM \`post-media\` u1 INNER JOIN \`post-media\` u2 WHERE u1.\`id\` > ${tmp_post_media_duplicate_current_id} \
+			AND u1.\`id\` < u2.\`id\` AND u1.\`uri-id\` = u2.\`uri-id\` AND u1.\`url\`= u2.\`url\` LIMIT ${limit}")
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_media_duplicate_q} item(s) deleted until ${tmp_post_media_duplicate_current_id} in ${final_i}s"
 done
+wait
 
 echo "tmp_post_user_duplicate"
 tmp_post_user_duplicate_q="${limit}"
 tmp_post_user_duplicate_current_id=0
 until [[ "${tmp_post_user_duplicate_q}" -lt "${limit}" ]]; do
 	initial_i=$(date +%s)
-	if [[ "${tmp_post_user_duplicate_q}" -gt 0 ]]; then
-		while read -r id; do
-			if [[ -n "${id}" ]]; then
-				"${dbengine}" "${db}" -N -B -q -e \
-					"DELETE FROM \`post-user\` WHERE \`id\` = ${id}" &
-				if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
-					wait -n
-				fi
-				tmp_post_user_duplicate_q=$((tmp_post_user_duplicate_q + 1))
-				tmp_post_user_duplicate_current_id="${id}"
+	while read -r id; do
+		if [[ -s "${id}" ]]; then
+			"${dbengine}" "${db}" -N -B -q -e \
+				"DELETE FROM \`post-user\` WHERE \`id\` = ${id}" &
+			if [[ $(jobs -r -p | wc -l) -ge $(($(getconf _NPROCESSORS_ONLN) * 1)) ]]; then
+				wait -n
 			fi
-		done < <("${dbengine}" "${db}" -N -B -q -e \
-			"SELECT v1.\`id\` FROM \`post-user\` v1 INNER JOIN \`post-media\` v2 WHERE v1.\`id\` > ${tmp_post_user_duplicate_current_id} AND v1.\`id\` < v2.\`id\` AND v1.\`uri-id\` = v2.\`uri-id\` LIMIT ${limit}")
-	fi
+			tmp_post_user_duplicate_q=$((tmp_post_user_duplicate_q + 1))
+			tmp_post_user_duplicate_current_id="${id}"
+		fi
+	done < <("${dbengine}" "${db}" -N -B -q -e \
+		"SELECT v1.\`id\` FROM \`post-user\` v1 INNER JOIN \`post-media\` v2 WHERE v1.\`id\` > ${tmp_post_user_duplicate_current_id} \
+				AND v1.\`id\` < v2.\`id\` AND v1.\`uri-id\` = v2.\`uri-id\` LIMIT ${limit}")
 	final_i=$(($(date +%s) - initial_i))
 	echo "${tmp_post_user_duplicate_q} item(s) deleted until ${tmp_post_user_duplicate_current_id} in ${final_i}s"
 done
+wait
 
 "${dboptimizer}" "${db}"                                                              #&> /dev/null;
 bash -c "cd ${folder} && sudo -u ${user} ${phpversion} bin/console.php maintenance 0" #&> /dev/null;