phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '671d911c7b560b02d175d642d1bd1252' 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 ('671d911c7b560b02d175d642d1bd1252', -1, 1765874899, 1765874899, 'd849d836', -4, 0, 0)

Line : 187
File : sessions.php