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 ('93ea643ee28ed2dc59f15b30fa7ccd74', -1, 1508398035, 1508398035, '36e02b60', 15, 0, 0)

Line : 187
File : sessions.php