What I expected to happen was...:
I would be able to use the #minecraft:bedrock command in the /clone command to clone all blocks which are not bedrock in the following format: "/clone {pos1} {pos2} {pos3} filtered #minecraft:bedrock"

What actually happened was...:
I get the message "Unknown block tag '#minecraft:bedrock'"

Steps to Reproduce:
1. Prepare the clone command as presented in the "What I expected to hapen was..." section. Make sure the positions aren't too big or overlap so there are no other possible errors
2. Run the command