Solved Mail bugged, same mail on repeat.

[Poltrique]

So, I've got the same mail when I try to open my mailbox. When I open it, this error pop up:
[game] An error occurred in the base update loop: NullReferenceException: Object reference not set to an instance of an object.
at StardewValley.Object.getOne_PatchedBy<furyx639.ExpandedStorage__tlitookilakin.AeroCore>(Object this)
at MailFrameworkMod.MailController.<>c__DisplayClass10_0.<ShowLetter>b__0(Item i) in C:\Projetos\Stardew Valley\ModSolution\MailFrameworkMod\MailController.cs:line 173
at System.Collections.Generic.List`1.ForEach(Action`1 action)
at MailFrameworkMod.MailController.ShowLetter() in C:\Projetos\Stardew Valley\ModSolution\MailFrameworkMod\MailController.cs:line 170
at MailFrameworkMod.MailController.mailbox_prefix(GameLocation __instance) in C:\Projetos\Stardew Valley\ModSolution\MailFrameworkMod\MailController.cs:line 319
at StardewValley.GameLocation.mailbox_PatchedBy<Digus.MailFrameworkMod__purrplingcat.npcadventure>(GameLocation this)
at StardewValley.GameLocation.performAction_PatchedBy<FlashShifter.SVECode__PeacefulEnd.FashionSense__PeacefulEnd.SolidFoundations__purrplingcat.npcadventure__spacechase0.BiggerBackpack__spacechase0.DynamicGameAssets__spacechase0.SpaceCore__tlitookilakin.AeroCore>(GameLocation this, String action, Farmer who, Location tileLocation)
at StardewValley.GameLocation.checkAction_PatchedBy<PeacefulEnd.AlternativeTextures__PurrplingCat.QuestFramework>(GameLocation this, Location tileLocation, Rectangle viewport, Farmer who)
at StardewValley.Locations.BuildableGameLocation.checkAction(Location tileLocation, Rectangle viewport, Farmer who)
at StardewValley.Farm.checkAction(Location tileLocation, Rectangle viewport, Farmer who)
at StardewValley.Game1.<>c__DisplayClass859_0.<tryToCheckAt>b__0()
at StardewValley.Game1.tryToCheckAt_PatchedBy<Platonymous.PyTK>(Vector2 grabTile, Farmer who)
at StardewValley.Game1.pressActionButton_PatchedBy<tlitookilakin.AeroCore>(KeyboardState currentKBState, MouseState currentMouseState, GamePadState currentPadState)
at StardewValley.Game1.<>c__DisplayClass913_0.<UpdateControlInput>b__0()
at StardewValley.Game1.UpdateControlInput(GameTime time)
at StardewValley.Game1._update(GameTime gameTime)
at StardewValley.Game1.Update(GameTime gameTime)
at StardewModdingAPI.Framework.SCore.OnPlayerInstanceUpdating(SGame instance, GameTime gameTime, Action runUpdate)

Can someone help me figure out how to solve it, I've tried to update all my mods, but nothing worked, and it still tells me that some of them are outdated. So what am I supposed to do?
Sometimes I can have some mail before that one pop up.

Windows
Stardew Valley 1.5.6
Game log

 

[Poltrique]

Well, I fixed it. Missed a mod when updating and forgot to delete the old version.