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 ('4918b1309a6dcb1677dfd4980d19fe46', -1, 1511461993, 1511461993, '36e0661a', -1, 0, 0)

Line : 211
File : sessions.php