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 ('4a97ef75b64806b6846af634b425fa02', -1, 1527183586, 1527183586, '36a6f50a', 18, 0, 0)

Line : 187
File : sessions.php