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 ('b4b2462139c5bda48dcf9d730d8d11f6', -1, 1526878973, 1526878973, '369f55c1', 12, 0, 0)

Line : 187
File : sessions.php