phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7cb15b19a1e16beb15bbe1d4a99df7a9' 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 ('7cb15b19a1e16beb15bbe1d4a99df7a9', -1, 1765287718, 1765287718, 'd849d8bc', -4, 0, 0)

Line : 187
File : sessions.php