Published changes getting disappeared in Redwood pages with multiple VBCS projects

Summary:

We have created multiple VBCS projects for different page customizations (as different team members working on multiple pages). After publishing them individually, we have obersved changes getting overwritten or disappeared. We see that all these pages sharing same extension ID, even though the dependencies ID is different. We would like to know what is the accurate way of using VCBS project for multiple pages. The disappearing on published changes heavily impacting our project timelines. Can someone clarify on this?

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