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 ('ab42e55acc2ac9d24d496453c2bbd4fd', -1, 1537340055, 1537340055, '36e0a68d', 8, 0, 0)

Line : 187
File : sessions.php