It means they only allow SPECIFC CPUS and there are 2 versions of the board. Overview Drivers & Downloads (Windows 10 64-bit only) Documentation Service Manual Setup and Specifications Aurora R10 motherboard NWN7M pegatron 69M10HT00B01 released on December 9, 2019 is supported by Dell with these OEM CPU =* HXPR2 AMD R5-3500, 6C, 65WV7JDD AMD R5-3600, 6C, 65W2HCV8 AMD R5-3600X, 6C, 95WVF3FD AMD R5-3600XT, 6C, 95WXNKFV AMD R7-3700X, 8C, 65W4GX0G AMD R7-3800X, 8C, 105WVJ84G AMD R7-3800XT, 8C, 105WCHMWG AMD R9-3900, 12C, 65W6KJC4 AMD R9-3900X, 12C, 105W2F53D AMD R9-3900XT, 12C, 105W1MHH5 AMD R9-3950X, 16C, 105W Aurora R10 motherboard TYR0X pegatron 69M10HT20A01 released on January 11, 2021 is supported by Dell with these OEM CPU =* HXPR2 AMD R5-3500, 6C, 65WVVDNW AMD R5-5600X, 6C, 65WNTMXC AMD R7-5800, 8C, 65WP0M7X AMD R7-5800X, 8C, 105WMCW0T AMD R9-5900, 12C, 65WKGKW8 AMD R9-5900X, 12C, 105WMMX5C AMD R9-5950X, 16C, 105W
FYI - A guy on YouTube tried to upgrade his Aurora R10 CPU to the newer 5000 series with the new 2.x BIOS installed but failed because the new BIOS still does not support the new Ryzen 5000 series CPU's on the Aurora R10. Anyways here his video on YouTube attempting the upgrade.
Aurora R10, failed CPU upgrade from 3700x to newer 5600x