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 ('b17335c63e62dded0e2ef7dfaf41bc3a', -1, 1503297306, 1503297306, '3690170c', 3, 0, 0)

Line : 189
File : sessions.php