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-rw-r--r--core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php b/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
index 385b8d3..90c4848 100644
--- a/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/sqlite/Schema.php
@@ -353,7 +353,7 @@ class Schema extends DatabaseSchema {
}
// Add the new indexes.
- $new_schema += $keys_new;
+ $new_schema = array_merge($new_schema, $keys_new);
$this->alterTable($table, $old_schema, $new_schema, $mapping);
}