BUG: Sim can't improve theirs skills / Vampires learn insanely fast

Problem

• My Vampires learn new skill at an insane fast rate
• My sims is trying to improve a skill but the skill bar won't budge 

Cause
Vampires are supposed to learn twice as fast as normal sims. Because of a bug, they learn a lot faster. The same bug makes the skill bar stuck for some sims.

Solution
None

Mods that solve the problem

• Clean up Skill Modifiers on Overwatch, V21 or newer fixes this issue 
• Awesome Mod 

Further Reading

• BUG: Pets can't learn certain skills