What are the possible errors that are causing this:

/home/api/target/generated-sources/annotations/org/example/core/user/model/User_.java:3:35
java: cannot find symbol
  symbol:   class Generated
  location: package javax. annotation.processing

Where the User object is:

import javax.persistence.*;
import java.sql.Timestamp;

@Entity
@Table(name = "users")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private int userId;

    @Column(name = "username", nullable = false, unique = true)
    private String username;

    @Column(name = "password_hash")
    private String passwords;

    @Column(name = "google_id", unique = true)
    private String googleId;

    @Column(name = "email", nullable = false, unique = true)
    private String email;

    @ManyToOne
    @JoinColumn(name = "subscription_id", nullable = false)
    private Subscription subscription;

    @Column(name = "created_at", nullable = false, updatable = false)
    private Timestamp createdAt;

    @Column(name = "updated_at", nullable = false)
    private Timestamp updatedAt;

    // Getters and Setters
}

The error happens when trying to build the project.

What could be wrong in the POM?

        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>javax.persistence-api</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>1.3.2</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <version>6.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-rdbms</artifactId>
            <version>6.0.7</version>
        </dependency>

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jpa</artifactId>
            <version>6.0.1</version>
        </dependency>

        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-jpa-query</artifactId>
            <version>6.0.0-release</version>
        </dependency>

Update:

After careful review I figured that the problem is with IntelliJ since using Maven build doesn’t throw this error.

I have tried to set the Global Settings but it won’t because of duplicated module: