1. Separate the initial import file into two, separate import files.
    1. The first file should contain information for importing new Constituents.
    2. The second file should contain the Proposal information.
  2. Assign Import IDs for the new Constituents before they are imported.
  3. Copy the values for the assigned Import IDs into the import file containing the Proposal information.
  4. Import the Constituents.
  5. Import the Proposals.
    1.  Note: the Import ID copied from the Constituent Import file will link the Proposal information to the newly-added Constituent records.