CTE incorrect generation

[jurakontor]

dear community, i am stuck with an issue and really need a help with.
I have following sql:

WITH ins AS ( INSERT INTO profile_source_on_chain (address, nick_name) VALUES ('0x72c9fb7ed19d3ce51cea5c56b3e023cd918baadf3', 'Sei Ape Club') ON CONFLICT (address, nick_name) DO NOTHING RETURNING id) SELECT id FROM ins UNION ALL SELECT id FROM profile_source_on_chain WHERE address = '0x72c9fb7ed19d3ce51cea5c56b3e023cd918baadf3' and nick_name = 'Sei Ape Club';

and i need to use bun to create same sql. This is what i am doing:
ProfileSourceOnChain is table with 3 columns: id (uuid), address , nickname varchar
Have constraint (address , nickname)

`
onChain := dto2.ProfileSourceOnChain{ Address: "address",
NickName:"nickname",
}

		subq := tx.NewInsert().Model(&onChain).Returning("id").
			On("CONFLICT (address, nick_name) DO nothing")
		
		union := tx.NewSelect().Model((*dto2.ProfileSourceOnChain)(nil)).Column("id").
			Where("address = ?","address").
			Where("nick_name = ?","nickname")

		if err = tx.NewSelect().UnionAll(union).Column("id").Table("ins").With("ins", subq).Scan(ctx, &r); err != nil {
			s.logger.Log("error", err)
			return err
		}

`

the above code will generate
(WITH ins AS ( INSERT INTO profile_source_on_chain (address, nick_name) VALUES ('0x72c9fb7ed19d3ce51cea5c56b3e023cd918baadf3', 'Sei Ape Club') ON CONFLICT (address, nick_name) DO NOTHING RETURNING id) SELECT id FROM ins) UNION ALL SELECT id FROM profile_source_on_chain WHERE address = '0x72c9fb7ed19d3ce51cea5c56b3e023cd918baadf3' and nick_name = 'Sei Ape Club';

the issue with brackets at the beginning and after FROM ins. After i execute the generated query ill get the following error:
ERROR: WITH clause containing a data-modifying statement must be at the top level

Question - how to write bun correctly to avoid those brackets. The rest for query is absolutely correct. Or this is "feature" of bun and no solution here?

thanks