Build for TP-Link Archer C1200-AC1200

Did you ask TP-Link which version it replaces? V1 and V2 are completely different:
https://wikidevi.com/wiki/TP-LINK_Archer_C5_v1.x
https://wikidevi.com/wiki/TP-LINK_Archer_C5_v2.x

Hint: open the device and see what SoC is inside.