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 ('2f5e8cdb31c7f4f602ab8993ed7a9fb8', -1, 1519429927, 1519429927, '36e23797', 14, 0, 0)

Line : 187
File : sessions.php