Alias cannot be inferred

Question

Given the following models, each of the associations work fine in isolation but not if used together. I'm getting:

Error: Alias cannot be inferred: "Employee" has multiple relations with "Person"

Here is the code:

@Table() export default class Employee extends Model {

/** * Selected id of the tester role */ @Column({ field: 'tester_id' }) @ForeignKey(() => Person) public testerId: number;

@BelongsTo(() => Person , { as: 'tester', foreignKey: 'testerId' })
public tester: Person;

/** * Selected id of the Developer role */ @Column({ field: 'developer_id' }) @ForeignKey(() => Person) public developerId: number;

@BelongsTo(() => Person, { as: 'dev', foreignKey: 'developerId' })
public developer: Person;

}

@Table() export default class Person extends Model {

@HasMany(() => Employee , { as: 'tester', foreignKey: 'testerId' }) public tester: Employee[];

    @HasMany(() => Employee, { as: 'developer', foreignKey: 'developerId' })
    public developer: Employee[];

}

And the error: Error: Alias cannot be inferred: "Employee" has multiple relations with "Person"

can anyone help me?