Rubber Grease Filled Donut

Rubber Grease Filled Donut - General Mechanical Advice

How do I fix this popped grease donut? It’s similar to those on a tie rod end. I can’t seem to figure out how to get it off. I’ve undone the nut above and disconnected the sway bar, but I can’t get it loose. It’s on the end of the bearing arm, under the brake/bearing assembly.