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 ('da6f1a6cb9f4f16a250a6ac6fa6fc8d0', -1, 1531890203, 1531890203, '36a2809f', -10, 0, 0)

Line : 187
File : sessions.php