phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a940b008a1f83240c471623f2c7173e5' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a940b008a1f83240c471623f2c7173e5', -1, 1775179931, 1775179931, 'd849d858', 21, 0, 0)

Line : 187
File : sessions.php