phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8dcefb78610dc3d1455d06040417f4bb' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8dcefb78610dc3d1455d06040417f4bb', -1, 1763769470, 1763769470, 'd849d888', -4, 0, 0)

Line : 187
File : sessions.php