Bdtjtk

when I want to run my spring boot app (with h2 database) I should change my database name every time and I can't use my previous databases and if I don't change it's name, it gives me this error:

Error starting ApplicationContext. To display the auto-configuration report 

re-run your application with 'debug' enabled.

2019-01-01 00:01:28.153 ERROR 2404 --- [           main] 

o.s.boot.SpringApplication           : Application startup failed



org.springframework.orm.ObjectOptimisticLockingFailureException: Object of 

class [guru.springframework.domain.User] with identifier [1]: optimistic 

locking failed; nested exception is org.hibernate.StaleObjectStateException: 

Row was updated or deleted by another transaction (or unsaved-value mapping 

was incorrect) : [guru.springframework.domain.User#1]

my application.property:

spring.profiles.active=springdatajpa

spring.jackson.serialization.write-dates-as-timestamps=false

spring.jpa.show-sql=true

spring.h2.console.enabled=true

spring.datasource.url= jdbc:h2:file:E:/db16

spring.jpa.hibernate.ddl-auto=update

User class:

import javax.persistence.*;



import java.util.ArrayList;



import java.util.List;





@Entity



public class User extends AbstractDomainClass  {



private Long userId;

private String username;





private String password;



private String firstName;

private String lastName;

private String email;

private String encryptedPassword;

private Boolean enabled = true;



@ManyToMany(fetch = FetchType.EAGER)

@JoinTable

// ~ defaults to @JoinTable(name = "USER_ROLE", joinColumns = @JoinColumn(name = "user_id"),

//     inverseJoinColumns = @joinColumn(name = "role_id"))

private List<Role> roles = new ArrayList<>();

private Integer failedLoginAttempts = 0;





public User() {



}



public User(Long userId, String username, String firstName, String lastName, 

        boolean enabled, String email, String encrytedPassword) {

    super();



    this.userId = userId;

    this.username = username;

    this.firstName = firstName;

    this.lastName = lastName;

    this.enabled = enabled;

    this.email = email;

    this.encryptedPassword = encrytedPassword;



}



public Long getUserId() {

    return userId;

}



public void setUserId(Long userId) {

    this.userId = userId;

}



public String getUsername() {

    return username;

}



public void setUsername(String username) {

    this.username = username;

}



public String getFirstName() {

    return firstName;

}



public void setFirstName(String firstName) {

    this.firstName = firstName;

}



public String getLastName() {

    return lastName;

}



public void setLastName(String lastName) {

    this.lastName = lastName;

}



public String getEmail() {

    return email;

}



public void setEmail(String email) {

    this.email = email;

}



public String getPassword() {

    return password;

}



public void setPassword(String password) {

    this.password = password;

}



public String getEncryptedPassword() {

    return encryptedPassword;

}



public void setEncryptedPassword(String encryptedPassword) {

    this.encryptedPassword = encryptedPassword;

}



public Boolean getEnabled() {

    return enabled;

}



public void setEnabled(Boolean enabled) {

    this.enabled = enabled;

}





public List<Role> getRoles() {

    return roles;

}



public void setRoles(List<Role> roles) {

    this.roles = roles;

}



public void addRole(Role role){

    if(!this.roles.contains(role)){

        this.roles.add(role);

    }



    if(!role.getUsers().contains(this)){

        role.getUsers().add(this);

    }

}



public void removeRole(Role role){

    this.roles.remove(role);

    role.getUsers().remove(this);

}



public Integer getFailedLoginAttempts() {

    return failedLoginAttempts;

}



public void setFailedLoginAttempts(Integer failedLoginAttempts) {

    this.failedLoginAttempts = failedLoginAttempts;

}

}

Role class:

import guru.springframework.domain.AbstractDomainClass;



import javax.persistence.Entity;

import javax.persistence.FetchType;

import javax.persistence.JoinTable;

import javax.persistence.ManyToMany;

import java.util.ArrayList;

import java.util.List;





@Entity

public class Role extends AbstractDomainClass {



private String role;



@ManyToMany(fetch = FetchType.EAGER)

@JoinTable

// ~ defaults to @JoinTable(name = "USER_ROLE", joinColumns = @JoinColumn(name = "role_id"),

//     inverseJoinColumns = @joinColumn(name = "user_id"))

private List<User> users = new ArrayList<>();



public String getRole() {

    return role;

}



public void setRole(String role) {

    this.role = role;

}



public List<User> getUsers() {

    return users;

}



public void setUsers(List<User> users) {

    this.users = users;

}



public void addUser(User user){

    if(!this.users.contains(user)){

        this.users.add(user);

    }



    if(!user.getRoles().contains(this)){

        user.getRoles().add(this);

    }

}



public void removeUser(User user){

    this.users.remove(user);

    user.getRoles().remove(this);

}



}

AbstractDomain class:

import javax.persistence.*;

import java.util.Date;







@MappedSuperclass

public class AbstractDomainClass implements DomainObject {



@Id

@GeneratedValue(strategy = GenerationType.AUTO)

Integer id;



@Version

private Integer version;



private Date dateCreated;

private Date lastUpdated;



@Override

public Integer getId() {

    return this.id;

}



@Override

public void setId(Integer id) {

    this.id = id;

}



public Integer getVersion() {

    return version;

}



public void setVersion(Integer version) {

    this.version = version;

}



public Date getDateCreated() {

    return dateCreated;

}



public Date getLastUpdated() {

    return lastUpdated;

}



@PreUpdate

@PrePersist

public void updateTimeStamps() {

    lastUpdated = new Date();

    if (dateCreated==null) {

        dateCreated = new Date();

    }

}

}

Thanks for your answer!
This StackoverFlow tells me to add some more details, so I put this sentence and I don't know what else I should add for details!