Indeed, by construction of the database, structures whose topology is already part of the database are removed. The invariants used to identify the topology are the coordination sequences and the ring sizes: this strategy does ensure that no two structures with the same net are present, but it is too restrictive since two distinct nets could share these invariants. In the future, the use of a unique topological identifier through CrystalNets.jl could thus potentially lead to the generation of more structures.