phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8c86fd6b1ea8b6054c44a2eb01305464' 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 ('8c86fd6b1ea8b6054c44a2eb01305464', -1, 1765075763, 1765075763, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php