You shouldn't put Vaseline over sunscreen. Applying Vaseline over sunscreen can potentially interfere with the sunscreen's effectiveness. Vaseline creates a barrier on the skin, which may prevent the sunscreen from properly adhering to the skin and reduce its ability to protect you from harmful UV rays.
It's best to apply sunscreen first, and then allow it to fully absorb into the skin before applying Vaseline. If you're looking to lock in moisture and create a protective barrier, consider applying Vaseline after your skincare routine but before your sunscreen.
