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 ('9434910e6c5ef1ff8051db9ab1e0f2b1', -1, 1508240090, 1508240090, '36c68fd2', -9, 0, 0)

Line : 189
File : sessions.php