Encountered a glitch with Mermaid World

So, I realize this post is ancient, and by now probably most Simmers have moved on to Sims 4. However, during this COVID crisis I have gotten back into Sims 3, and experienced the exact same problem! I came upon this post while searching for a solution, but ended up solving it myself. Posting the solution here in case any other Sims 3 player runs into the same problem.

Step 1: Acquire a Potent Cure Elixer and use on the broken mermaid. (Mine kept his scaly legs but swam like a normal sim. He also somehow kept the elixer. This may be because I had already bought the Permanent Mermaid LTR for him.)

Step 2: Acquire Mermadic Kelp and eat it. (If you don't want to go through the hassle of finding a mermaid while diving and keeping their attention long enough to ask about their fish parts, I feel that using the cheat to get enough lifetime happiness points to buy the kelp is totally justified, considering you're having to fix a terrible glitch.)

Step 3: avoid traveling abroad with this Sim! (Or, keep a Potent Cure Elixer and a piece of Mermadic Kelp on hand somewhere for emergencies.)

And that's it! And remember.... Just keep Simming! Just keep Simming! Haha!

Hey there,split this post into it's own thread so it wouldn't be necroing a really old one.