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 ('f39c8c68c77c3f3f1897d3b80e68e204', -1, 1518931121, 1518931121, '36f25ecc', -4, 0, 0)

Line : 187
File : sessions.php