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 ('6b9892f00b2d7bfa03873c5555ddac9c', -1, 1503297340, 1503297340, '3690170c', -2, 0, 0)

Line : 189
File : sessions.php