phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1b8df87b00925aedf60f9c30fe4c947f' 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 ('1b8df87b00925aedf60f9c30fe4c947f', -1, 1771929333, 1771929333, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php