Find the assumption behind the original choice
A nearby class may have won because neither adult could drive to a farther venue and still collect on time. A new bus route matters only if it changes that constraint. Check its actual timetable, the walk at both ends, and whether it runs when the class finishes. A route that reaches the venue in the afternoon but has no suitable return trip does not yet solve the reason the household chose the closer option.
Preserve the reason for the earlier decision
Keep the original reason with the decision. Then compare only the assumptions that changed and the effects on other people. If the nearby class requires a paid notice period, include that cost before moving. A better future option does not erase an existing commitment.
Compare the cost of changing now with changing later
Ask the current class about notice or fees and check whether the new class has a real place available. Put a decision date before any deadline that matters. If the new route begins next month, the household may be able to observe one ordinary trip before committing. Keep the old decision active until the replacement is confirmed. Reopening a question is useful when assumptions change; it need not unsettle arrangements that still work today.