TypeORM upsert entities with OneToMany relationships - typeorm

Question

I have a few entities created on TypeORM and I want to upsert an array of data with all the entities. Here I have the entities:
#Entity({name: "__sales_rep"})
export class SalesRep {
#PrimaryColumn()
ldap: string;
#Column("text")
name: string
#OneToMany(() => ParentCompany, (parent_company) => parent_company.sales_rep, { cascade: ['insert', 'update'] })
parent_companies: ParentCompany[]
}
#Entity({name: "__parent_company"})
export class ParentCompany {
#PrimaryColumn()
id: number;
#Column("text")
name: string
#OneToMany(() => Advertiser, (advertiser) => advertiser.parent_company, { cascade: ['insert', 'update'] })
advertisers: Advertiser[]
#ManyToOne(() => SalesRep, (sales_rep) => sales_rep.parent_companies)
sales_rep: SalesRep
}
#Entity({name: "advertiser"})
export class Advertiser {
#PrimaryColumn()
id: number;
#Column("text")
name: string
#ManyToOne(() => ParentCompany, (parent_company) => parent_company.advertisers)
parent_company: ParentCompany
}
And here is how I am trying to insert the data as cascading the data. I believe the problem is that when I insert two advertisers with the same parent_company for example the constraints of the foreign key aren't allowing me to make the entire insertion.
async function loadData(data) {
console.log("Beggning data insertion");
try{
const insertData = data.rows.map((row) => {
const currentSalesRep ? {
ldap: row.ldap,
name: row.full_name
},
currentParentCompany = {
id: row.parent_company_id,
name: row.parent_company_name,
sales_rep: currentSalesRep
};
return {
id: row.advertiser_id,
name: row.advertiser_name,
parent_company: currentParentCompany
}
})
salesRepRepository
.upsert(insertData, ['id']);
typeorm
}
catch(e){
logger.error(e)
throw e;
}
}