phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('33d3ed85ace82ffaaf6b8c1d4f4fb45f', -1, 1506054474, 1506054474, '36c6a54a', 18, 0, 0)

Line : 187
File : sessions.php