phpBB : Critical Error

if the following error message can not help you to solve the problem,please contact the Administrator. [email protected],please make sure to send the error message together to us,thank you!
Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b8f6c6ccc4c27f163e09e1316acd948a' 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 ('b8f6c6ccc4c27f163e09e1316acd948a', -1, 1714157864, 1714157864, '031633f1', -4, 0, 0)

Line : 186
File : sessions.php