Anyone available to assist with passing this challenge
@Eric Burté @Abhijeet Soni @Piyusha Pilania Thank you all for the prompt response. I found out the issue. I was creating my Master & Lookup relationship in the wrong custom object. It was supposed to be in the "Offer" object that I made previously. Thanks
Piyusha Pilania (Horizontal Digital) 
Forum Ambassador
@Keiji Otsubo has explained this issue in detail in this article: https://qiita.com/Keiji_otsubo/items/0c1fbb5c4601522d6829
You can use Google translate to translate the language. This will solve all the issues. If not create a new playground and start fresh.
Eric Burté (DEVOTEAM)
Forum Ambassador
Hello @William Randolph, have you followed instructions from 2nd unit of same module (https://trailhead.salesforce.com/content/learn/modules/data_modeling/object_relationships) ?
Create a Master-Detail Relationship
Now, we’re going to create a second relationship field. We want a master-detail relationship where Property is the master and Favorite is the detail.
- On the Object Manager page for the custom object, click Fields & Relationships.
- Click New.
- Select Master-Detail Relationship and click Next.
- For Related To, choose Property.
- Click Next.
- For Field Name, enter Property and click Next.
- Click Next, Next, and Save.
Eric
Please make your lookup field name is correct or not.
@Piyusha Pilania Thanks. I tried what they followed and am still getting a error message. Anyway we can hop on a call for assistance?
Piyusha Pilania (Horizontal Digital)
Forum Ambassador
This might be helpful: https://trailhead.salesforce.com/trailblazer-community/feed/0D54S00000Eo3xMSAR
