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 ('8a0421e1f8d8f1fd45b04bf6ea33b337', -1, 1519565550, 1519565550, '369f1e1a', -4, 0, 0)

Line : 187
File : sessions.php