Transaction rejected, reason 'dust'

Bisq gave me the warning below. Can anybody tell me what it means? Has it anything to do with a ‘dust attack’?

A transaction was rejected from the network.
reason ‘dust’ (64)

note that above the XXXX shows a tx number in the real warning.

update: Bisq gives me the warning everytime i start bisq. Also bisq notifies that connection to bitcoin mainnet is failed. Is that connected to the warning?

thanks for the reply.

It helped me to delete the SPV files and resynchronize.

Go to:
Settings> Network info> Delete / Resave SPV files

Thanks, that worked!
however, do you know what the error was about ?