Check for existence of creation time when running migrations

changelog/unreleased/40991

@@ -0,0 +1,5 @@
+Bugfix: Check if account creation time exists for migrations
+
+In some rare scenarios it could have happened that the migration responsible for adding the creation time in the oc_accounts table was not correctly inserted into oc_migrations with the consequence that it was reattempted i.e. when upgrading apps, even if the column was already present. This has been now fixed.
+
+https://github.com/owncloud/core/pull/40991

core/Migrations/Version20230120101715.php

@@ -32,11 +32,13 @@ class Version20230120101715 implements ISchemaMigration {
 	public function changeSchema(Schema $schema, array $options) {
 		$prefix = $options['tablePrefix'];
 		$accountsTable = $schema->getTable("${prefix}accounts");
-
-		$accountsTable->addColumn('creation_time', Type::INTEGER, [
-				'notnull' => true,
-				'length' => 32,
-				'default' => 0,
-		]);
+
+		if (!$accountsTable->hasColumn('creation_time')) {
+			$accountsTable->addColumn('creation_time', Type::INTEGER, [
+					'notnull' => true,
+					'length' => 32,
+					'default' => 0,
+			]);
+		}
 	}
 }