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 ('e9fbf37c3338911b6c4ae77ad98a87fe', -1, 1508824217, 1508824217, '36a1497b', 15, 0, 0)

Line : 187
File : sessions.php