Is it possible to define id property's length?

[Habbiton]

Using LB4 + MySQL DB through loopback-connector-mysql

A
{id: string, name: string}

id	names
0007bc40-814b-11ec-8128-4df48bd1ae4d	John
0007bc40-814b-11ec-8128-4df48bd1ae3d	Marie

B
{id: string, aId:string, name: string}

id	aId	names
0007bc40-814b-11ec-8128-4df48bd1ae2d	0007bc40-814b-11ec-8128-4df48bd1ae4d	Eve
0007bc40-814b-11ec-8128-4df48bd1ae1d	0007bc40-814b-11ec-8128-4df48bd1ae4d	Ronald
0007bc40-814b-11ec-8128-4df48bd1ae0d	0007bc40-814b-11ec-8128-4df48bd1ae3d	Philipe

To create those models, I've used this code:

A

export class Payroll extends Entity {
	@property({
		type: 'string',
		id: true,
		defaultFn: 'uuid',
	})
	id: string;

	
	@property({
		type: 'string',
		required: true,
		length: 64,
	})
	name: string;
}

B

export class Payroll extends Entity {
	@property({
		type: 'string',
		id: true,
		defaultFn: 'uuid',
	})
	id: string;


	@belongsTo(() => A)
	aId: string;
	
	@property({
		type: 'string',
		required: true,
		length: 64,
	})
	name: string;
}

On both tables, id is a VARCHAR(255), although it only needs a VARCHAR(36)
On B table, aId is a VARCHAR(512), which is even worse... This could be solved by defining aId as follows:
@belongsTo(() => A, undefined, { length: 36, }) aId: string;
Now, b.aId is a VARCHAR(36), but then i get the error following error: "Error: UNKNOWN_CODE_PLEASE_REPORT: Referencing column 'aId' and referenced column 'id' in foreign key constraint 'fk_a_b_aId' are incompatible", because both VARCHAR have different size.

How can I define the id property's length on DB?

Thank you

[A-Corregidor]

Any help with this?