cpcBid at AdGroup level is setting null for migrated campaigns

Steps:
1. Run the script to migrate bing campaign
./bing_campaigns_migrator.sh -d3 -U 1496 -threads 10 > /var/local/tsa/log/bing_campaigns_migrator/campaigns_migration_batch_001.log
2. After migration check campaigns JSON object from bing.campaigns table

Actual Result: cpcBid value is setting null for migrated campaigns

Expected Result: cpcBid value should not set null for migrated campaigns

Sample:
After migration:

"adGroup":{"cpcBid":null,"contentMatchBid":0.0,"network":"OwnedAndOperatedAndSyndicatedSearch","id":1169880587695646,"status":"Active","language":"English","name":"667e8a68-dc21-40ab-9e3b-c0be0bfec5ac_10002_10961_9400"}}]

Before migration:

"adGroupStructures":[{"adGroup":

{"language":"English","adDistribution":["Search"],"pricingModel":"Cpc","contentMatchBid":0.0,"network":"OwnedAndOperatedAndSyndicatedSearch","searchBid":0.05000000074505806,"id":1169880587695646,"status":"Active","name":"667e8a68-dc21-40ab-9e3b-c0be0bfec5ac_10002_10961_9400"}