PRO Username: doubledan 
Do you have active membership?: Yes 
Your knowledge about PRO: Beginner   
What have you done before the problem was there? 
I took off the oval stone held by the happiny   
What have you already tried to solve the problem? 
I have tried to put the oval stone back , but system gives a message " this item is not holdable"   
Description and Message 
PRO Username: doubledan 
Do you have active membership?: Yes 
Your knowledge about PRO: Basic Knowledge   
What have you done before the problem was there? 
I took off the oval stone held by the happiny   
What have you already tried to solve the problem? 
I have tried to put the oval stone back , but system gives a message " this item is not holdable"   
Description and Message 
I took off the oval stone from a happiny,however, I can't put back the oval to the happiny. There is a system message" This item is not holdable." . 
I know happiny need to hold oval stone in order to evolve, but it can't now.  
Can anyone help me?