Commercial property rights on lease

[Cristiana Kimmet]

Hi, I am new to this. My husband and I just had a great opportunity to invest on a commercial unit and the biggest reason we jumped in is that the unit is being leased by someone we know and she doesn't plan to leave at time soon. Anyway, we found out the lease agreement is until Oct this year (6 more month from now). My original plan was to rent directly to the tenant but honoring the price. Now the prior leasing agent is claiming we need to stay with them until the lease is finished and they charge 15%. Do they have this right? Thanks for any input