You should always backup your accounts guys, no matter what. It can always happen a modder stops updating his mods.
Anyways, indeed it will not work to update his mod with the mod of another modder. he used unique signature which cannot match with other signatures, except of your device is rooted and patched. it is rare a modder decides to use unique signatures, but it is possible a modder does that and Yaska is one of them. As far as I am aware, the other modders here do use all the same signature tho so the mods can be cross-updated. Anyways, you should always be prepared for cases where a modder stops updating a game by having secured your account. When the modder stops updating it is already too late, don't wait it to happen.