How To FIXX this error?

Applying explicit migration: 201701101528067_Aphrodite9.
System.FormatException: Invalid length for a Base-64 char array or string.
at System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength)
at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)
at System.Convert.FromBase64String(String s)
at System.Data.Entity.Migrations.DbMigration.GetModel (Func`2 modelAccessor)
at System.Data.Entity.Migrations.DbMigration.GetTarge tModel()
at System.Data.Entity.Migrations.DbMigrator.ApplyMigr ation(DbMigration migration, DbMigration lastMigration)
at System.Data.Entity.Migrations.Infrastructure.Migra torLoggingDecorator.ApplyMigration(DbMigration migration, DbMigration lastMigration)
at System.Data.Entity.Migrations.DbMigrator.Upgrade(I Enumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.Infrastructure.Migra torLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
at System.Data.Entity.Migrations.DbMigrator.UpdateInt ernal(String targetMigration)
at System.Data.Entity.Migrations.DbMigrator.<>c__Disp layClasse.<Update>b__d()
at System.Data.Entity.Migrations.DbMigrator.EnsureDat abaseExists(Action mustSucceedToKeepDatabase)
at System.Data.Entity.Migrations.Infrastructure.Migra torBase.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
at System.Data.Entity.Migrations.DbMigrator.Update(St ring targetMigration)
at System.Data.Entity.Migrations.Infrastructure.Migra torBase.Update(String targetMigration)
at System.Data.Entity.Migrations.Design.ToolingFacade .UpdateRunner.RunCore()
at System.Data.Entity.Migrations.Design.ToolingFacade .BaseRunner.Run()
Invalid length for a Base-64 char array or string.

looks like a value u tried to migrate to the db is to large , can u maybe explain what u tried ?

Problem > Source