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 ('d3ca443a6d4d9f64ee3e33d917f177c5', -1, 1527299376, 1527299376, '1714f0c1', -4, 0, 0)

Line : 187
File : sessions.php