The caveat can remain in place until such time as the estate dispute is resolved. You will want to put your position together and provide evidence such as medical information etc to show the position they are coming from is invalid. If you do not wish to agree (which you are under no legal obligation to do) then the matter may require to go to court for a determination. You can apply to have the caveat removed, but this would be unlikely until such times as the dispute is resolved.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
https://www.lawsoc-ni.org/solicitors (N. Ireland)
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