[22:48:10 ERROR]: [com.songoda.ultimaterepairing.core.configuration.Config] Error saving config
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
        at java.lang.String.substring(Unknown Source) ~[?:1.8.0_201]
        at com.songoda.ultimaterepairing.core.configuration.ConfigSection.lambda$getValues$24(ConfigSection.java:329) ~[?:?]
        at java.util.stream.Collectors.lambda$toMap$58(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.ReduceOps$3ReducingSink.accept(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source) ~[?:1.8.0_201]
        at java.util.Iterator.forEachRemaining(Unknown Source) ~[?:1.8.0_201]
        at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.AbstractPipeline.copyInto(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.AbstractPipeline.evaluate(Unknown Source) ~[?:1.8.0_201]
        at java.util.stream.ReferencePipeline.collect(Unknown Source) ~[?:1.8.0_201]
        at com.songoda.ultimaterepairing.core.configuration.ConfigSection.getValues(ConfigSection.java:328) ~[?:?]
        at org.bukkit.configuration.file.YamlRepresenter$RepresentConfigurationSection.representData(YamlRepresenter.java:24) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:95) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.representer.BaseRepresenter.representMapping(BaseRepresenter.java:157) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.representer.SafeRepresenter$RepresentMap.representData(SafeRepresenter.java:315) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.representer.BaseRepresenter.representData(BaseRepresenter.java:95) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.representer.BaseRepresenter.represent(BaseRepresenter.java:65) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:306) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:270) ~[patched_1.14.4.jar:git-Paper-233]
        at org.yaml.snakeyaml.Yaml.dump(Yaml.java:245) ~[patched_1.14.4.jar:git-Paper-233]
        at com.songoda.ultimaterepairing.core.configuration.Config.saveToString(Config.java:540) ~[?:?]
        at com.songoda.ultimaterepairing.core.configuration.Config.save(Config.java:516) ~[?:?]
        at com.songoda.ultimaterepairing.core.configuration.Config.save(Config.java:503) ~[?:?]
        at com.songoda.ultimaterepairing.core.configuration.Config.saveChanges(Config.java:475) ~[?:?]
        at com.songoda.ultimaterepairing.core.configuration.Config$SaveTask.run(Config.java:646) ~[?:?]
        at java.util.TimerThread.mainLoop(Unknown Source) ~[?:1.8.0_201]
        at java.util.TimerThread.run(Unknown Source) ~[?:1.8.0_201]