mod update json

So, it works fine for 1.15.2 and 1.14.4, but it doesn't show if an update is available in 1.12.2..

anyone got any ideas?

this is my json:

{
	"homepage": "newbitlylink",
	"promos": {
		"1.12.2-latest": "1.2.0-1.12.2",
		"1.14.4-latest": "1.2.0-1.14.4",
		"1.15.2-latest": "1.2.0-1.15.2"
	}
}