Liangzhou (619) — the same event in Old Book of Tang and New Book of Tang

Old Book of Tang: Li Gui was captured by his subordinate An Xinggui and surrendered, and Hexi was pacified.; New Book of Tang: An Xiuren, a general…

What each source says

Li Gui was captured by his subordinate An Xinggui and surrendered, and Hexi was pacified.

辛亥，李軌為其偽尚書安興貴所執以降，河右平。
Location: 舊唐書卷1 武德2年 5月

An Xiuren, a general of Liangzhou, captured Li Gui and surrendered.

涼州將安脩仁執李軌以降
Location: 新唐書卷001 高祖武德2年5月