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 ('f8cf2b44c7c173be2ee097df1f2c6725', -1, 1524532327, 1524532327, '6b1630f3', 15, 0, 0)

Line : 189
File : sessions.php