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 ('5c09b8875a08e5be0f945e6e9e8be05e', -1, 1508231930, 1508231930, '36a1497b', -4, 0, 0)

Line : 187
File : sessions.php