Updating a sub-type breaks objects based on it?

[s_p_b]

It looks like making any changes to sub-type also changes the GUID, which immediately breaks all the objects that's I've based on this sub-type. Now I have to go through each of them and re-assign their sub-type. Is there any way to lock in a GUID so that I don't have to keep doing this? It's very painful during active development of a library. 

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Sebastian B - Architect
Toronto Ontario
AC 25 - Windows

[SenecaDesignLLC]

As long as you don't have objects open that read that subtype when you save it, unless you added a parameter then you have to open and save them. I agree it's a pain.