phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '875d4635ada38b8b15fbf6e01f60ae9d' 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 ('875d4635ada38b8b15fbf6e01f60ae9d', -1, 1770078969, 1770078969, 'd849d805', 4, 0, 0)

Line : 187
File : sessions.php