phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4d6cd7a1e86873972eca65ad01f3594' 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 ('b4d6cd7a1e86873972eca65ad01f3594', -1, 1770290311, 1770290311, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php