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 ('b2cc6255e8c3f9c6c682d1a080e8d43f', -1, 1513290765, 1513290765, '36a3d16d', -9, 0, 0)

Line : 186
File : sessions.php