Proceed to tile the floor as you normally would.
How to glue ceramic tile to floor.
Simple best options of removing the glue residue from floor tiles once the floor tile is removed it is a two part job.
In the first stage the floor tile itself is taken up simply cut or chiseled from the floor.
Step 3 apply new adhesive to the floor.
Following the instruction on the adhesive container spread glue on the place on the floor where you ll be gluing the tile.
Start at the chalk line intersection in the center of the floor and select a trowel with notches that matches the notch size indicated on the glue container.
Spread a bed of strong adhesive such as portland cement or the adhesive recommended by the new tile manufacturer over the existing tiles.
After that the adhesive which was holding it in place needs to be removed.
Step 4 position the tile.