Hi,
Vik Booking doesn’t use “lightbox”. It uses its own JavaScript library to render a sort of a “lightbox” gallery. We believe you have a conflict with query selectors, and that’s why you are seeing two “lightbox galleries”.
However, this is something you should fix in your Theme because Vik Booking has got no settings to turn this feature off, and, most of all, Vik Booking correctly starts image galleries on its own DIV elements, with prefixed selectors that contain “vik” or “vbo” (for Vik Booking) in the “class” attribute. Your Theme should definitely not interfere with private elements generated by third party plugins.
Hopefully, you can find a setting in your Theme so that only elements with certain class attributes can be rendered as lightbox galleries, and not any list of images.
We hope this helps!