invalid go version '1.21.0': must match format 1.23

[ftasnetamot]

When trying to compile pwru un a current linux system I receive this weird error message: Its asking for a future version of golang. When Looking to all go releases 1.22.3 ist the most current go version.

TARGET_GOARCH=amd64 go generate
go: errors parsing go.mod:
/home/user/pwru/go.mod:3: invalid go version '1.21.0': must match format 1.23
/home/user/pwru/go.mod:5: unknown directive: toolchain
make: *** [Makefile:20: pwru] Fehler 1

Edit: My go version is go1.19.8. Line 3 of /home/user/pwru/go.mod is: go 1.21.0

Can it be, that your Dependacy 1.16 is not longer up to date?