phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '28bb60e64a9e7329b3ce0586fd12d0f2' 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 ('28bb60e64a9e7329b3ce0586fd12d0f2', -1, 1766209973, 1766209973, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php