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-rw-r--r--lib/private/DB/MigrationService.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/private/DB/MigrationService.php b/lib/private/DB/MigrationService.php
index e7361cb4cab..0cf37cb995a 100644
--- a/lib/private/DB/MigrationService.php
+++ b/lib/private/DB/MigrationService.php
@@ -634,7 +634,7 @@ class MigrationService {
if ($isUsingDefaultName && \strlen($table->getName()) - $prefixLength >= 23) {
throw new \InvalidArgumentException('Primary index name on "' . $table->getName() . '" is too long.');
}
- } elseif (!$primaryKey instanceof Index) {
+ } elseif (!$primaryKey instanceof Index && !$sourceTable instanceof Table) {
throw new \InvalidArgumentException('Table "' . $table->getName() . '" has no primary key and therefor will not behave sane in clustered setups.');
}
}