diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e8df09c..dbc09a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -108,3 +108,7 @@ jobs:
         run: tests/integration/full-restore-roundtrip.sh 35-apache pgsql
       - name: Full restore round trip on MariaDB, with Mail (foreign keys) and a disabled app
         run: tests/integration/full-restore-roundtrip.sh 35-apache mysql
+      - name: Full restore of a backup made by 1.0.0-rc.1 (no table structure) on PostgreSQL
+        run: tests/integration/full-restore-roundtrip.sh 35-apache pgsql legacy
+      - name: Full restore of a backup made by 1.0.0-rc.1 (no table structure) on MariaDB
+        run: tests/integration/full-restore-roundtrip.sh 35-apache mysql legacy
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3409abf..0244488 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ instead carried by the app description, the git tag, the release, and this file.
 
 ## [Unreleased]
 
+### Fixed
+- A full restore of a backup made before 1.0.0-rc.2 with `--skip-missing-tables` failed on
+  PostgreSQL with "relation ... does not exist": the left-out tables were still looked up to set
+  their ID counters. It now skips them. A new test restores a backup made by 1.0.0-rc.1 on
+  PostgreSQL and MariaDB.
+
 ## [1.0.0-rc.2] - 2026-10-18
 
 Second release candidate for 1.0.0; the app version is 0.9.8. Fixes from a full disaster recovery
diff --git a/appinfo/info.xml b/appinfo/info.xml
index efe6cc8..8763946 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -41,7 +41,7 @@ welcome: use the "Share your experience" link on the admin page.
 
 Developed and sponsored by [Ensembia](https://www.ensembia.com), which also offers paid help with
 restoring a backup after a crash.]]></description>
-    <version>0.9.8</version>
+    <version>0.9.9</version>
     <licence>agpl</licence>
     <author mail="dillard.blom@ensembia.com">Dillard Blom</author>
     <namespace>NgBackup</namespace>
diff --git a/lib/Db/DbDumper.php b/lib/Db/DbDumper.php
index 716b63e..605fb8e 100644
--- a/lib/Db/DbDumper.php
+++ b/lib/Db/DbDumper.php
@@ -216,7 +216,7 @@ final class DbDumper {
 				}
 				$report['restored'][] = $table;
 			}
-			$this->restoreSequences($manifest['sequences'] ?? []);
+			$this->restoreSequences($manifest['sequences'] ?? [], $report['missing']);
 			$this->resumeForeignKeys($foreignKeys);
 			$this->db->commit();
 			// Foreign keys of the tables created above, now their rows are in. Not inside the
@@ -573,11 +573,16 @@ final class DbDumper {
 		return $name;
 	}
 
-	private function restoreSequences(array $sequences): void {
+	/** @param list<string> $leftOut tables not restored (--skip-missing-tables): they do not exist here */
+	private function restoreSequences(array $sequences, array $leftOut = []): void {
 		if (!$this->db->getDatabasePlatform() instanceof \Doctrine\DBAL\Platforms\PostgreSQLPlatform) {
 			return;
 		}
+		$leftOut = array_flip($leftOut);
 		foreach ($sequences as $info) {
+			if (isset($leftOut[$info['table']])) {
+				continue;
+			}
 			$seq = $this->db->fetchOne('SELECT pg_get_serial_sequence(quote_ident(?), ?)', [$info['table'], $info['column']]);
 			if ($seq === false || $seq === null) {
 				continue;
diff --git a/tests/integration/full-restore-roundtrip.sh b/tests/integration/full-restore-roundtrip.sh
index e9c3657..a26e755 100755
--- a/tests/integration/full-restore-roundtrip.sh
+++ b/tests/integration/full-restore-roundtrip.sh
@@ -2,15 +2,20 @@
 # Disaster recovery: occ backup:key:import + backup:target:add + backup:restore:full on a
 # SECOND, fresh Nextcloud instance that never saw the first one, sharing only the backup
 # location (a local directory, bind-mounted into both containers) -- see PLAN.md 3.7.
-# Usage: full-restore-roundtrip.sh <nextcloud-image-tag> [sqlite|pgsql|mysql]
+# Usage: full-restore-roundtrip.sh <nextcloud-image-tag> [sqlite|pgsql|mysql] [legacy]
 #   e.g. full-restore-roundtrip.sh 35-apache pgsql
+# With "legacy" the origin runs NG Backup 1.0.0-rc.1 (0.9.7), whose backups do not record the
+# structure of their tables: the restore must then leave the tables of the disabled app out
+# with --skip-missing-tables, as for a real backup made before 1.0.0-rc.2.
 # With pgsql or mysql the origin also has what broke real disaster recoveries: the Mail app with a synced
 # account (foreign keys between its tables) and Deck installed and then switched off (tables of
 # an app that is not enabled). The restore instance has neither; --install-apps adds Mail.
 set -euo pipefail
 IMAGE="nextcloud:${1:-35-apache}"
 DB="${2:-sqlite}"
+LEGACY="${3:-}"
 APP=$(cd "$(dirname "$0")/../.." && pwd)
+ORIGIN_APP="$APP"
 NET=ngb-frt-net
 SHARED=$(mktemp -d)
 chmod 777 "$SHARED"
@@ -23,9 +28,17 @@ cleanup() {
 	docker run --rm -v "$SHARED:/target" alpine sh -c 'rm -rf /target/*' >/dev/null 2>&1 || true
 	rmdir "$SHARED" 2>/dev/null || true
 	rm -f /tmp/ngb-frt-kit.json /tmp/ngb-frt-pass
+	[ -n "${LEGACY_DIR:-}" ] && rm -rf "$LEGACY_DIR"
+	return 0
 }
 trap cleanup EXIT
 
+if [ "$LEGACY" = legacy ]; then
+	LEGACY_DIR=$(mktemp -d)
+	curl -fsSL https://github.com/dillardblom/ng_backup/releases/download/v1.0.0-rc.1/ng_backup-0.9.7.tar.gz | tar -xz -C "$LEGACY_DIR"
+	ORIGIN_APP="$LEGACY_DIR/ng_backup"
+fi
+
 run_on() { docker exec -u www-data "$1" php occ "${@:2}"; }
 
 # Database settings for an instance: SQLite inside the container, or its own PostgreSQL container
@@ -50,11 +63,11 @@ ORIGIN_DB=$(db_env origin)
 # shellcheck disable=SC2086
 docker run -d --name ngb-frt-origin --network "$NET" $ORIGIN_DB \
 	-e NEXTCLOUD_ADMIN_USER=admin -e NEXTCLOUD_ADMIN_PASSWORD=admin \
-	-v "$APP:/var/www/html/custom_apps/ng_backup:ro" -v "$SHARED:/mnt/shared" "$IMAGE" >/dev/null
+	-v "$ORIGIN_APP:/var/www/html/custom_apps/ng_backup:ro" -v "$SHARED:/mnt/shared" "$IMAGE" >/dev/null
 for i in $(seq 1 90); do run_on ngb-frt-origin status 2>/dev/null | grep -q "installed: true" && break; sleep 3; done
 docker exec ngb-frt-origin chown www-data:www-data /var/www/html/custom_apps
 run_on ngb-frt-origin app:enable ng_backup >/dev/null
-ok "origin instance up ($DB)"
+ok "origin instance up ($DB${LEGACY:+, NG Backup 0.9.7})"
 
 docker exec ngb-frt-origin sh -c "printf 'full restore roundtrip passphrase 2026\n' > /tmp/pass"
 run_on ngb-frt-origin backup:key:init --passphrase-file=/tmp/pass --label=CI >/dev/null || fail "key init"
@@ -118,7 +131,16 @@ run_on ngb-frt-restore backup:target:add offsite local -a null::null -o datadir=
 run_on ngb-frt-restore backup:list offsite | grep -q "$SNAP" || fail "the origin's snapshot is not listed after connecting the location"
 ok "recovery kit imported, existing repository adopted, snapshot visible"
 
-OUT=$(run_on ngb-frt-restore backup:restore:full offsite "$SNAP" --no-interaction --install-apps 2>&1) || {
+RESTORE_OPTS=(--no-interaction --install-apps)
+if [ "$LEGACY" = legacy ] && [ "$DB" != sqlite ]; then
+	# Without --skip-missing-tables an older backup must be refused, naming the app's tables
+	REFUSED=$(run_on ngb-frt-restore backup:restore:full offsite "$SNAP" "${RESTORE_OPTS[@]}" 2>&1) \
+		&& fail "an older backup with tables of unknown structure was restored without --skip-missing-tables"
+	printf '%s\n' "$REFUSED" | grep -q "oc_deck_boards" || { printf '%s\n' "$REFUSED" | tail -20; fail "the refusal does not name the missing tables"; }
+	ok "older backup refused without --skip-missing-tables, missing tables named"
+	RESTORE_OPTS+=(--skip-missing-tables)
+fi
+OUT=$(run_on ngb-frt-restore backup:restore:full offsite "$SNAP" "${RESTORE_OPTS[@]}" 2>&1) || {
 	printf '%s\n' "$OUT" | tail -40
 	docker exec ngb-frt-restore sh -c 'tail -c 6000 /var/www/html/data/nextcloud.log' || true
 	fail "restore:full"
@@ -134,7 +156,11 @@ docker exec ngb-frt-restore test -f /var/www/html/data/frtest/files/Docs/note.tx
 run_on ngb-frt-restore files:scan frtest >/dev/null || fail "files:scan fails after restore"
 ok "database, files and ng_backup's own state are all intact and usable after the restore"
 
-if [ "$DB" != sqlite ]; then
+if [ "$DB" != sqlite ] && [ "$LEGACY" = legacy ]; then
+	[ "$(sql restore "select count(*) from information_schema.tables where table_name = 'oc_deck_boards'")" = 0 ] || fail "a table of unknown structure was created"
+	[ "$(sql restore "select count(*) from oc_mail_accounts where drafts_mailbox_id is not null")" = 1 ] || fail "the mail account was not restored"
+	ok "older backup: tables of the disabled app left out, Mail restored"
+elif [ "$DB" != sqlite ]; then
 	[ "$(sql restore "select count(*) from information_schema.tables where table_name = 'oc_deck_boards'")" = 1 ] || fail "the tables of the disabled app were not created"
 	[ "$(sql restore "select count(*) from oc_mail_accounts where drafts_mailbox_id is not null")" = 1 ] || fail "the mail account was not restored"
 	[ "$(sql restore "select count(*) from information_schema.table_constraints where constraint_type = 'FOREIGN KEY' and table_name like 'oc_mail_%'")" -gt 0 ] \
@@ -146,4 +172,4 @@ fi
 run_on ngb-frt-restore backup:run offsite -l post-restore-check >/dev/null || fail "a new backup after the restore fails"
 ok "the restored instance can run a new backup of its own"
 
-echo "FULL RESTORE ROUNDTRIP PASS ($DB)"
+echo "FULL RESTORE ROUNDTRIP PASS ($DB${LEGACY:+, legacy})"