I had veneers 5 months back. I have marginal gap in my upper teeth and gum is inflamed in lower teeth?

I have a marginal gap in my front teeth veneer and I consulted a different dentist he told me it can be sealed without the need to replace the veneer as it is unnoticeable, would that put my in future risk that the veneer would deboned ? the veneer biological width is invading my gum and causing gingivitis my new dentist suggested that a gum adjustment should be done to accommodate the veneers as the preparation was sub-gingival already and replacing veneers would not solve the problem ?