so I am trying to animate a 4 legged spider and I wanted two of the ik targets (legs) to move 10 frames ahead of the other two. However, every time I select the two ik targets and move the keyframes (I selected all keyframes and moved them 10 frames up), it does it to all ik targets (legs). I was following this video and everything worked fine until 7:03, please let me know what could be causing this error.
https://www.youtube.com/watch?v=imbIsNAvUpM&t=308s&ab_channel=Polyfjord