dotnet-db-samples: ORA-00918: column ambiguously defined

Using Oracle 12C 12.1.0 with latest EF Core 3.1 provider

I am mapping to an existing user/schema/database (: and are not in charge of it.

I have a contact person that have a contact type. I only have navigation to the ContactType

When I run this code

var contact = context.Contacts.Include(x=>x.Type).FirstOrDefault();

That produces this sql:

 fail: Microsoft.EntityFrameworkCore.Database.Command[20102]
      Failed executing DbCommand (67ms) [Parameters=[], CommandType='Text', CommandTimeout='0']
      SELECT "c"."ID", "c"."TYPE", "c"."CUSTOMER", "c"."EMAIL", "c"."NAME", "c"."PHONE", "c0"."ID", "c0"."NAME"
      FROM "SAMSON"."CUSTOMER_CONTACT" "c"
      INNER JOIN "SAMSON"."CUSTOMER_CONTACT_TYPE" "c0" ON "c"."TYPE" = "c0"."ID"
      FETCH FIRST 1 ROWS ONLY

I have no problems running the sql: Is it an error, or are my relation mapping wrong?

SELECT "c"."ID", "c"."TYPE", "c"."CUSTOMER", "c"."EMAIL", "c"."NAME", "c"."PHONE", "c0"."ID", "c0"."NAME"
FROM "SAMSON"."CUSTOMER_CONTACT" "c"
INNER JOIN "SAMSON"."CUSTOMER_CONTACT_TYPE" "c0" ON "c"."TYPE" = "c0"."ID";