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 ('d6a19db8ff5a55a5908f9cc07a87a942', -1, 1516395911, 1516395911, '36ea2d0a', -2, 0, 0)

Line : 187
File : sessions.php