phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8f0f7e9015384e68d69242550f8ec0bf' 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 ('8f0f7e9015384e68d69242550f8ec0bf', -1, 1766232853, 1766232853, 'd849d819', 4, 0, 0)

Line : 187
File : sessions.php