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 ('18cb47fe6d0beaefe9af420d54b1f5c7', -1, 1548220375, 1548220375, '12cdf6ee', -4, 0, 0)

Line : 187
File : sessions.php