Calabasas, California - Kourtney Kardashian's engagement to Travis Barker is apparently not sitting well with her ex, Scott Disick.

Shauna Mokler, Travis' ex-wife, isn't the only one not handling Kravis' engagement too well.

According to sources, Lord Disick isn't too happy about his ex's betrothal either.

Fans of Keeping Up with the Kardashians may recall that the Talentless owner proposed to Kourt years ago. The two had an on-again, off-again relationship from 2005 to 2015 and share three kids.

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It has been alleged that the business owner has had a hard time accepting Kourtney's spicy romance with Travis for some time now. But during the KUTWK reunion special, the 38-year-old appeared to come to terms with Kourtney's romance and even "gave his blessing."

However on Monday, an insider confirmed to People that Scott still has issues with Kravis.

"Scott never approved of Kourtney dating Travis. He has struggled with their relationship," the source spilled.

"He always had this idea that he and Kourtney would eventually get back together. He was pretty shocked when he found out that she was dating Travis," they added.

The drama!

Still, Scott's reaction to Kourt's relationship upgrade isn't too surprising.

In August, he landed in hot water when his alleged DMs to Kourt's other ex, Younes Bendjima, were leaked. In the messages, Scott appeared to be mocking Kravis' over-the-top PDA moments.

The scandal occurred right before Scott and Amelia Hamlin split, after dating for about a year, and is said to have caused the friction.

Is Lord Disick just acting out because of his own failed romances? And will he eventually accept that Kourtney has truly moved on?

For their kids' sake, hopefully the Lord can work things out.