A stalled provision of the SAFE Act that would create a database of ammunition purchases is a “complicated issue” Gov. Andrew Cuomo said in a radio interview late last week.

The database has been put on hold since 2015 through a two-way memorandum of understanding reached by Cuomo and Senate Republicans, who held majority control of the chamber at the time.

Democratic Senate Majority Leader Andrea Stewart-Cousins last week called on the governor’s administration to follow through with the creation of the database as Cuomo has pushed a four-point national platform for gun control that includes a ban on assault-style weapons, expanded background checks and a mental health database as well as a red-flag law.

But Cuomo, speaking with NPR, said both legal and technological issues remain. And he challenged lawmakers to develop their own ideas.

“To stop ammunition purchases, it’s not just in a gun store or at a gun show, it’s also the internet because if you do background checks when people go to buy ammunition at a gun store then Joe just opened up an internet web, internet sale and everybody can buy, which many people do now, buy it over the internet,” Cuomo said.

“So it raised legal issues and technological issues. If anyone in the Legislature has a better way to do it, I haven’t seen the bill and that’s normally how they communicate. But if they have a better proposal and they have a Legislative proposal, I would love to see it.”

Cuomo last week urged Democratic candidates for president to make gun control a central focus of the presidential campaign after two mass shootings this month less than 24 hours apart killed dozens in Ohio and Texas.