phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b15a7bba8a4b5e1e7b11d4f3eb1b171f' 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 ('b15a7bba8a4b5e1e7b11d4f3eb1b171f', -1, 1765013690, 1765013690, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php