Pre-set cooldown storage variable causes ClassCastException

[sovdeeth]

Skript/Server Version

[09:52:00 INFO]: [Skript] Skript's aliases can be found here: https://github.com/SkriptLang/skript-aliases
[09:52:00 INFO]: [Skript] Skript's documentation can be found here: https://docs.skriptlang.org/
[09:52:00 INFO]: [Skript] Skript's tutorials can be found here: https://docs.skriptlang.org/tutorials
[09:52:00 INFO]: [Skript] Server Version: git-Paper-100 (MC: 1.20.1)
[09:52:00 INFO]: [Skript] Skript Version: 2.7.0-beta3 (skriptlang-github)
[09:52:00 INFO]: [Skript] Installed Skript Addons:
[09:52:00 INFO]: [Skript]  - skript-reflect v2.3.1-for-skript-beta (https://github.com/TPGamesNL/skript-reflect)
[09:52:00 INFO]: [Skript]  - SkBee v2.14.1 (https://github.com/ShaneBeee/SkBee)
[09:52:00 INFO]: [Skript] Installed dependencies:
[09:52:00 INFO]: [Skript]  - WorldGuard v7.0.9+5934e49

Bug Description

When using a variable for cooldown storage, if the variable is already set to anything that is not a date, running the command will cause getLastUsage() to throw a ClassCastException.

Due to unchecked cast on line 477 of ScriptCommand:

			return (Date) Variables.getVariable(name, null, false);

Expected Behavior

getLastUsage() should interpret any non-dates as if they did not exist, aka as not having been used before.

Steps to Reproduce

on load:
    set {cooldown} to 123

command /example:
    cooldown: 12 hours
    cooldown storage: {cooldown}
    trigger:
        broadcast "cooldown: %{cooldown}%"

Errors or Screenshots

[09:55:26 INFO]: Sahvde [69e37026-2c7d-4255-ac76-9b13a5fe8f74]: /example
[09:55:26 ERROR]: Could not pass event PlayerCommandPreprocessEvent to Skript v2.7.0-beta3
java.lang.ClassCastException: class java.lang.Long cannot be cast to class ch.njol.skript.util.Date (java.lang.Long is in module java.base of loader 'bootstrap'; ch.njol.skript.util.Date is in unnamed module of loader 'Skript-2.7.0-beta3.jar' @71fd3442)
        at ch.njol.skript.command.ScriptCommand.getLastUsage(ScriptCommand.java:477) ~[Skript-2.7.0-beta3.jar:?]
        at ch.njol.skript.command.ScriptCommand.execute(ScriptCommand.java:262) ~[Skript-2.7.0-beta3.jar:?]
        at ch.njol.skript.command.Commands.handleCommand(Commands.java:193) ~[Skript-2.7.0-beta3.jar:?]
        at ch.njol.skript.command.Commands$1.onPlayerCommand(Commands.java:152) ~[Skript-2.7.0-beta3.jar:?]
        at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:40) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:git-Paper-100]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.1.jar:git-Paper-100]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.1.jar:git-Paper-100]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.performChatCommand(ServerGamePacketListenerImpl.java:2275) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$20(ServerGamePacketListenerImpl.java:2259) ~[?:?]
        at net.minecraft.util.thread.BlockableEventLoop.lambda$submitAsync$0(BlockableEventLoop.java:59) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1339) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:197) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1316) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1309) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:136) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1287) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1175) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-100]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
[09:55:26 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'example' in plugin Skript v2.7.0-beta3
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:155) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.v1_20_R1.CraftServer.dispatchCommand(CraftServer.java:1006) ~[paper-1.20.1.jar:git-Paper-100]
        at org.bukkit.craftbukkit.v1_20_R1.command.BukkitCommandWrapper.run(BukkitCommandWrapper.java:64) ~[paper-1.20.1.jar:git-Paper-100]
        at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:265) ~[paper-1.20.1.jar:?]
        at net.minecraft.commands.Commands.performCommand(Commands.java:324) ~[?:?]
        at net.minecraft.commands.Commands.performCommand(Commands.java:308) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.performChatCommand(ServerGamePacketListenerImpl.java:2299) ~[?:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$20(ServerGamePacketListenerImpl.java:2259) ~[?:?]
        at net.minecraft.util.thread.BlockableEventLoop.lambda$submitAsync$0(BlockableEventLoop.java:59) ~[?:?]
        at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1339) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:197) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1316) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1309) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:136) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1287) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1175) ~[paper-1.20.1.jar:git-Paper-100]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-100]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.ClassCastException: class java.lang.Long cannot be cast to class ch.njol.skript.util.Date (java.lang.Long is in module java.base of loader 'bootstrap'; ch.njol.skript.util.Date is in unnamed module of loader 'Skript-2.7.0-beta3.jar' @71fd3442)
        at ch.njol.skript.command.ScriptCommand.getLastUsage(ScriptCommand.java:477) ~[Skript-2.7.0-beta3.jar:?]
        at ch.njol.skript.command.ScriptCommand.execute(ScriptCommand.java:262) ~[Skript-2.7.0-beta3.jar:?]
        at ch.njol.skript.command.ScriptCommand.onCommand(ScriptCommand.java:221) ~[Skript-2.7.0-beta3.jar:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
        ... 23 more

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