Invalid Object name in entity framework MVC [TPC Approach]

I have implemented the DbContext in my project. I used the inheritance using the TPC Approach of entity framework. When I run the code to fetch the database record it throw an exception.

[Added the class structure with exception message]

When I use the Entity framework to get the user by providing the 'UserDefault user' user.Login & user.Password, it provide me the user details, but When I do navigate to user.Roles to check the roles, it throws the exception [Added below]:

already use the Table Attribute & Plurization Error at model binding etc.

//DbContext Class

public class Db : DbContext
{
    public Db()
    {
        Database.SetInitializer<Db>(null);
    }

    public DbSet<Roles> Roles { get; set; }
    public DbSet<UserDetails> UserDetails { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<UserDetails>()
            .ToTable("UserDetails")
            .HasMany(r => r.Roles).WithMany(o => o.UserDetails)
            .Map(f =>
            {
                f.MapLeftKey("UserId");
                f.MapRightKey("RoleId");
            });

        modelBuilder.Entity<Roles>().ToTable("Roles");
    }
}

//User Details Model

[Table("UserDetails", Schema = "dbo")]
public partial class UserDetails : DelEntity
{ 
    public string Title { get; set; }
    public string Name { get; set; }
    public string Login { get; set; }
    public string Password { get; set; }
    public string PreferName { get; set; }
    public string AddressLine1 { get; set; }
    public string AddressLine2 { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string PostCode { get; set; }
    public string Country { get; set; }
    public string CountryCode { get; set; }
    public string DateofBirth { get; set; }
    public string Gender { get; set; }
    public string Nationality { get; set; }
    public string DateofJoining { get; set; }
    public string DateofLeaving { get; set; }
    public string Language { get; set; }
    public Nullable<long> OrganizationId { get; set; }
    public Nullable<long> BranchId { get; set; }
    public Nullable<long> DepartmentId { get; set; }
    public string PhoneNumber { get; set; }
    public string PhoneExtension { get; set; }
    public string FaxNumber { get; set; }
    public string HomeNumber { get; set; }
    public string EmailAddress { get; set; }
    public string OtherReference { get; set; }

    public virtual ICollection<Roles> Roles { get; set; }
}

//Role Model

 [Table("Roles", Schema = "dbo")]
 public class Roles : Entity
 {
     public string Name { get; set; }
     public string Description { get; set; }

     public virtual ICollection<UserDetails> UserDetails { get; set; }
 }

//DelEntity Model

public class DelEntity : Entity, IDel
{
    //[Column("IsDeleted")]
    public bool IsDeleted { get; set; }
}

//Entity Model

public class Entity
{
    //[Key]
    //[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    //[Column("Id")]
    public int Id { get; set; }
}

//IDEL Interface

public interface IDel
{
    bool IsDeleted { get; set; }
}

ex.Message : An error occurred while executing the command definition. See the inner exception for details.

 ex.InnerMessage : {System.Data.SqlClient.SqlException (0x80131904): Invalid object name 'dbo.UserDetailsRoles'.
 at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
 at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
 at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
 at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
 at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
 at System.Data.SqlClient.SqlDataReader.get_MetaData()
 at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
 at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
 at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
 at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
 at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
 at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
 at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
 at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<>c__DisplayClassb.<Reader>b__8()
 at System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TInterceptionContext,TResult](Func`1 operation, TInterceptionContext interceptionContext, Action`1 executing, Action`1 executed)
 at System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext)
 at System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior)
 at System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
 at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
 ClientConnectionId:c965de15-d3cf-467c-9e19-866cd35a9400
 Error Number:208,State:1,Class:16}'

I have create the 'Roles' table in my database while the code is trying to fetch the 'dbo.UserDetailsRoles'. I have use the Table Attribute in class & modelBuilder.Entity().ToTable("Roles"); in DbContext class but still it is looking for UserDetailsRoles table. Here UserDetails is my other table which is associated with Roles.

Once I check with below code:

var context = new Db();
!context.Database.Exist()
{
    //Created Roles and save into Db
    //Created User and save into Db

    //get successfully the user.Id using where clause
    //get successfully the role.Id using where clause
}
//exit the method

I noticed that It creates an UserDetailsRoles table and save the setting of UserId and RoleId specified in OnModelCreating in Db class.

Code snippets:

modelBuilder.Entity<UserDetails>()
            .ToTable("UserDetails")
            .HasMany(r => r.Roles).WithMany(o => o.UserDetails)
            .Map(f =>
            {
                f.MapLeftKey("UserId");
                f.MapRightKey("RoleId");
            });

Is there any way I can change the name of this table?? [for UserId & RoleId columns's table]