While defining versions after selecting any Resources on entering and applying any information to 'Define' and 'Expression' field causes the editor to throw errors. Refer attached video and stack trace.

How to reproduce:
1. Create a new project
2. Create Tests Assembly Folder
3. Project > Tests > Inspector
4. Tests Import Settings >Add to Version Defines list.
5. Select any Resource
6. Write any information to 'Define' and 'Expression' fields > apply.

Actual results: ExpressionNotValidException spams the console

Expected results: without flooding console, only one error explaining the issue should appear

Occurring on:
2021.2.0a4, 2021.1.0b7, 2020.2.3f1, 2020.1.17f1, 2019.4.16f1

Environment:
Occurring on Windows 10 & macOS 10.15.

Stack Trace:
ExpressionNotValidException: Invalid character 'a' in expression : asd
UnityEditor.Scripting.ScriptCompilation.VersionRanges`1[TVersion].ParseExpression (System.String expression) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/VersionRanges.cs:144)
UnityEditor.Scripting.ScriptCompilation.VersionRanges`1[TVersion].GetExpression (System.String expression) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/VersionRanges.cs:40)
UnityEditor.Scripting.ScriptCompilation.VersionRangesFactory`1[TVersion].GetExpression (System.String expression) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/VersionRangesFactory.cs:16)
UnityEditor.Scripting.ScriptCompilation.EditorCompilation.GetTargetAssemblyDefines (UnityEditor.Scripting.ScriptCompilation.TargetAssembly targetAssembly, UnityEditor.Scripting.ScriptCompilation.VersionRangesFactory`1[TVersion] semVersionRangesFactory, UnityEditor.Scripting.ScriptCompilation.VersionRangesFactory`1[TVersion] unityVersionRangesFactory, System.Collections.Generic.Dictionary`2[TKey,TValue] versionMetaDatas, System.String[] editorOnlyCompatibleDefines, System.String[] playerAssembliesDefines, UnityEditor.Scripting.ScriptCompilation.ScriptAssemblySettings settings) (at /Users/bokken/buildslave/unity/build/Editor/Mono/Scripting/ScriptCompilation/EditorCompilation.cs:1323)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&) (at /Users/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)