Are you able to pay it?
If you pay off the court fine in full then that will be the end of it.
This sounds as though the sentence was a fine so there shouldn't be any other community requirement and then, if you pay in full, they cannot summons you back to court for breach.
Can I clarify anything for you?
If you mean a criminal record then it depends what you were summonsed for.
If it is S18 Railway Bye Laws then that is a criminal offence but it is not recordable so it wouldn't show on your DBS.