phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '817c9bfd5b297b883d2bcd9d4a2c1ba5' 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 ('817c9bfd5b297b883d2bcd9d4a2c1ba5', -1, 1756685926, 1756685926, 'c0a81014', -9, 0, 0)

Line : 187
File : sessions.php