There may soon be limits on who can use self-checkout at stores like Walmart and Target.

Some shoppers have reported that some self-checkout lines have been closed off at Walmart, according to TODAY.

“This is the second time this week that I’ve gone to Walmart, and this is a different Walmart, and it’s been right about this time, and all their self-checkouts are closed and they’ve started to open up the regular lines again,” one person said in a TikTok video.

According to a Reddit post, at least one Walmart had a sign blocking self-checkout lanes saying, “Attention: This self-checkout is for Spark shoppers and Walmart Scan & Go only.”

Walmart Scan & Go is only available for Walmart+ members, which is a paid subscription.