MSG_PROJECT_QUERY_NEWGUIDS

Generating new GUIDs for the project will cause the installer to behave as a new product.
Are you sure you want to change the GUIDs?

This message requests confirmation for the Project > Generate New GUIDs command. It draws your attention to the fact that with new GUIDs any installers created from the project will behave as if installing a completely different product:

• The Product GUID will be different, so the installer no longer detects older installations as belonging to the same product.
• All component GUIDs will be different, so the components will be installed independently from any previous components that used the old GUIDs.
• (Note that assembly GUIDs are not changed, because these must match the GUID in the corresponding manifest.)

These changes are necessary to create an independent product installer, but should be avoided if you want to maintain backward compatibility with your current installers.

Solution

Click Yes to confirm the changes and generate new GUIDs, or No if you want to retain the current ones.