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 ('ec6eb4408ecd3f4bb2c56b35bffd40ac', -1, 1503086686, 1503086686, '369c5c2e', -11, 0, 0)

Line : 187
File : sessions.php