Ask your creditors if they are willing to transfer the indebtedness to the buyer of your business. The creditor may be responsive to this, as long as the buyer has a stronger financial position than you. With an unsecured debt, the buyer may be willing to pledge property, or any number of collateral assets, effectively securing that debt, and eliminating your personal liability. Obviously, for this to make sense, the incumbent buyer must have assets of sufficient value - in most cases, assets of greater value than the unsecured debt itself. If the creditor will not allow the buyer to assume your personal liability on the debts of the business, you can still have a written agreement with the buyer stating that they will pay the specified debt, and indemnify you from those obligations.
Lenders are always eager to have additional people on the hook.
The advantage to you, in such an arrangement, is that you will no longer be primarily responsible for the debt, however you will remain secondarily responsible. Should the buyer not make good on the debt then the creditor will retain the right to hold you responsible for any amounts left owing. If you have pledged personal assets to secure a debt, you may want to see if the buyer is willing to substitute their property as security in order to allow the creditor to release any liens on your personal assets. You'll need both a cooperative buyer and creditor for this to be workable. None of these solutions are standard options, but rather strategies that you may want to look into.