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 ('6c465f9f267e03e0dde9d8f2b16751f7', -1, 1511502792, 1511502792, '36c68620', -4, 0, 0)

Line : 187
File : sessions.php