phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8e51c0855b5377b42270f0dcac6bf204' 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, priv_session_id) VALUES ('8e51c0855b5377b42270f0dcac6bf204', -1, 1781062173, 1781062173, '6817f35c', 2, 0, 0, '44f7b04494dc58fbaba2d7cbeb52acb2')

Line : 187
File : sessions.php