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 ('78c9a150693eef6cbfc92806de7f8fc4', -1, 1537490029, 1537490029, '36c68e79', 15, 0, 0)

Line : 187
File : sessions.php