Adding items in an invoice

Adding items in an invoice

I have a contracting business that performs similar tasks. A simple example might be "Clean for sale". I would perform a task like this on multiple jobs but the scope is different for each project. When I create an item for an invoice it indicates that "item already exists" if that same term was used for a previous project. As I mentioned the scope of work is different for various projects so the amounts differ. Is it possible to create the same line item for different projects without receiving this prompt while creating an invoice?