phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '839d6dea60d3f242a9afdd66ebb3b75a' 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 ('839d6dea60d3f242a9afdd66ebb3b75a', -1, 1769286525, 1769286525, 'd849d814', -4, 0, 0)

Line : 187
File : sessions.php