I need help on the private caveat issue.

Last month, I asked my tenant to move out since I plan to sell the house.
The problem is that, the tenant had renovated my house without my consent (he initially planned to buy my house).
Now he threatens me to lodge a private caveat on the property to stop any selling procedures until I pay the renovation cost.
I don't have any tenancy agreement with him, however, I did text him before the renovation that I won't bear the renovation cost (he agreed).

In case he applies for private caveat, can I remove it by simply filling the 19H form?
Is this thing is eligible for private caveat claim?
I need to sell the house fast, if possible, I hope I'm not going to settle this matter in court.

Thank you very much for your advice sir.
The thing is that anybody can register a private caveat by filling a form in Pejabat Tanah.
I'm not sure whether they will accept such claim.
Really give me headache.
In case he register the caveat, how do I remove it?

Thank you sir for the advice.
I don't know much about law.
I'm confused with (b) statement in the:

Section 323 of the National Land
Code (“Code”). It provides :
“(1) The persons and bodies at whose instance a private caveat
may be entered are—
(a) any person or body claiming title to, or any registrable interest
in, any alienated land [or undivided share in any alienated land] or
any right to such title or interest;
(b) any person or body claiming to be beneficially entitled under
any trust affecting any such land or interest; and
© the guardian or next friend of any minor claiming to be entitled
as mentioned in paragraph (b).”

Thanks for the clarification.
Fortunately, he already moved out.
It seems that he cannot lodge a private caveat without any documentation.
Guess I need to check with Pejabat Tanah.