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 ('c3f462acf09db9149c53fa09c2b3d1fe', -1, 1503385365, 1503385365, '369c5c8a', 14, 0, 0)

Line : 187
File : sessions.php