Question Paint Texture Tools error index out of range error.

[Unity Version]: 2021.3.8f1 LTS

Hey, i was painting terrain in unity, and something happened, i tried making a sixth terrain texture layer, but it for some reason was acting really strange, unity wouldnt let me click it at all, and thus, i cant paint with more than five layers, which is very detrimental.

It also started showing me an error, it says

IndexOutOfRangeException: Index was outside the bounds of the array.

UnityEditorInternal.ReorderableList.GetElementHeight (System.Int32 index) (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditorInternal.ReorderableList.GetClampedDragPosition (UnityEngine.Rect listRect) (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditorInternal.ReorderableList.CalculateRowIndex (UnityEngine.Rect listRect) (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditorInternal.ReorderableList.DoDraggingAndSelection (UnityEngine.Rect listRect) (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditorInternal.ReorderableList.DoListElements (UnityEngine.Rect listRect, UnityEngine.Rect visibleRect) (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditorInternal.ReorderableList.DoLayoutList () (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditor.TerrainTools.PaintTextureTool.LayersGUI (UnityEngine.Terrain terrain, UnityEditor.TerrainTools.IOnInspectorGUI editContext) (at Library/PackageCache/com.unity.terrain-tools@4.0.3/Editor/TerrainTools/PaintTextureTool.cs:458)

UnityEditor.TerrainTools.PaintTextureTool.OnInspectorGUI (UnityEngine.Terrain terrain, UnityEditor.TerrainTools.IOnInspectorGUI editContext) (at Library/PackageCache/com.unity.terrain-tools@4.0.3/Editor/TerrainTools/PaintTextureTool.cs:341)

UnityEditor.TerrainInspector.ShowPaint () (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditor.TerrainInspector.OnInspectorGUI () (at <5f40cdb07bd44d76a23dad985a4ec283>:0)

UnityEditor.UIElements.InspectorElement+<>c__DisplayClass59_0.<CreateIMGUIInspectorFromEditor>b__0 () (at <77cfaa957c26445e8d2fa87bf3ff3fa6>:0)

UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)

How would i go about fixing this?