I noticed some pages were missing from search, tried to rebuild but have lost me search index.
The site is 20 years old, I am running version 1.38.2.
Grateful for any help / clue what to do.
php maintenance/rebuildall.php
** Rebuilding fulltext search index (if you abort this will break searching; run this script again to fix):
Dropping index...
Clearing searchindex table...Done
Rebuilding index fields for 512234 pages...
...
5000
Wikimedia\Assert\ParameterAssertionException from line 72 of /var/www/html/wiki/vendor/wikimedia/assert/src/Assert.php: Bad value for parameter $dbKey: must not be empty
#0 /var/www/html/wiki/includes/page/PageReferenceValue.php(66): Wikimedia\Assert\Assert::parameter()
#1 /var/www/html/wiki/includes/page/PageIdentityValue.php(87): MediaWiki\Page\PageReferenceValue->__construct()
#2 /var/www/html/wiki/includes/Revision/RevisionStore.php(1722): MediaWiki\Page\PageIdentityValue->__construct()
#3 /var/www/html/wiki/includes/Revision/RevisionStore.php(1609): MediaWiki\Revision\RevisionStore->newRevisionFromRowAndSlots()
#4 /var/www/html/wiki/maintenance/rebuildtextindex.php(116): MediaWiki\Revision\RevisionStore->newRevisionFromRow()
#5 /var/www/html/wiki/maintenance/rebuildtextindex.php(68): RebuildTextIndex->populateSearchIndex()
#6 /var/www/html/wiki/maintenance/rebuildall.php(48): RebuildTextIndex->execute()
#7 /var/www/html/wiki/maintenance/doMaintenance.php(114): RebuildAll->execute()
#8 /var/www/html/wiki/maintenance/rebuildall.php(67): require_once('...')
#9 {main}