Crash while duplicating to another database

DTTG crashed while I was duplicating a group to another database. There’s nothing in the new database, but to judge from iPad storage DTTG is ‘using’ more storage space than before (‘using’ because the extra GBs don’t appear to take up any actual space on the HD). If I attempt to duplicate again will DTTG continue from where it stopped, or is the second database now filled with extraneous files I cannot access?

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