diff --git a/lib/Command/Db/CreateIndices.php b/lib/Command/Db/CreateIndices.php
index ed9ce69d87..c781664a58 100644
--- a/lib/Command/Db/CreateIndices.php
+++ b/lib/Command/Db/CreateIndices.php
@@ -40,10 +40,16 @@ protected function runCommands(): int {
 		$this->addForeignKeyConstraints();
 		$this->addUniqueIndices();
 		$this->connection->migrateToSchema($this->schema);
+		$this->listExistingIndices();
 
 		return 0;
 	}
 
+	private function listExistingIndices(): void {
+		$this->printComment('Existing indices:');
+		$messages = $this->indexManager->listExistingIndices();
+		$this->printInfo($messages, ' - ');
+	}
 	/**
 	 * add an on delete fk contraint to all tables referencing the main polls table
 	 */
diff --git a/lib/Db/V3/IndexManager.php b/lib/Db/V3/IndexManager.php
index 34e9e7aafd..21f6cce73b 100644
--- a/lib/Db/V3/IndexManager.php
+++ b/lib/Db/V3/IndexManager.php
@@ -104,6 +104,24 @@ public function createForeignKeyConstraint(string $parentTableName, string $chil
 		return 'Added ' . $parentTableName . '[' . $constraintColumn . '] <- ' . $childTableName . '[id]';
 	}
 
+	public function listExistingIndices() {
+		$this->needsSchema();
+		$messages = [];
+
+		foreach (array_keys(TableSchema::TABLES) as $tableName) {
+			$tableName = $this->getTableName($tableName);
+
+			if ($this->schema->hasTable($tableName)) {
+				$table = $this->schema->getTable($tableName);
+
+				foreach ($table->getIndexes() as $index) {
+					$messages[] = $tableName . ' - ' . $index->getName() . ' (' . implode(',', $index->getColumns()) . ')';
+				}
+			}
+		}
+		return $messages;
+	}
+
 	/**
 	 * Create one named index for table
 	 *
diff --git a/lib/Migration/V3/TableSchema.php b/lib/Migration/V3/TableSchema.php
index 454b2049e2..d4cdaffd4b 100644
--- a/lib/Migration/V3/TableSchema.php
+++ b/lib/Migration/V3/TableSchema.php
@@ -67,9 +67,6 @@ abstract class TableSchema {
 			'polls_polls_deleted' => ['columns' => ['deleted']],
 			'polls_polls_owners' => ['columns' => ['owner']],
 		],
-		PollGroup::RELATION_TABLE => [
-			'polls_groups_polls' => ['columns' => ['poll_id', 'group_id']],
-		],
 		Option::TABLE => [
 			'polls_options' => ['columns' => ['poll_id', 'deleted']],
 			'polls_options_hash' => ['columns' => ['poll_id', 'poll_option_hash', 'deleted']],