July 29, 2016 06:30 PM

The battle over Prince’s estate is one step closer to reaching its conclusion.

Carver County Judge Kevin Eide ordered genetic testing Friday on the late singer’s four known half-siblings Tyka Nelson, Sharon Nelson, Norrine Nelson and John Nelson. Two women – Brianna Nelson and Victoria Nelson – will also be tested after claiming they are the niece and grand-niece of the entertainer, according to the Associated Press.

The judge’s Friday order bars 29 other people, who claimed to either be the star’s children, siblings or distant relatives, from seeking a stake of his massive estate, estimated to be worth more than $250 million.

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According to Billboard, the judge tossed out five other claims because they had either been adopted by other parents (severing any relationship to Prince even if he had been their biological father) or they lacked “crucial documentary proof.”

“At this point, we’re looking at something that’s probably going to last through the year, at least. It just depends on if everyone agrees with everyone’s claims,” a source previously told PEOPLE about the battle. “It could be done very quickly. It’s just a lot of speculation at this point. Eventually all things will come to appear clear, but it is a slow process.”

The “Purple Rain” singer died April 21 after a prescription drug overdose and apparently did not have a will.

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