phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '507a9fbe6c370f39e9953220519c1e6d' 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 ('507a9fbe6c370f39e9953220519c1e6d', -1, 1766241746, 1766241746, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php