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 ('2f82f6e72bc0e7cd85aed979ce97977e', -1, 1438621639, 1438621639, '36e305c6', 3, 0, 0)

Line : 188
File : sessions.php