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 ('dbf7c63c35b5f0eafa891fca8b5201c3', -1, 1542492021, 1542492021, '365ab978', -7, 0, 0)

Line : 186
File : sessions.php