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java.lang.IllegalStateException: Attempt to mutate in notification	at javax.swing.text.AbstractDocument.writeLock(AbstractDocument.java:1343)	at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:662)	at javax.swing.text.JTextComponent.setText(JTextComponent.java:1441)	at javax.swing.JFormattedTextField$AbstractFormatter.install(JFormattedTextField.java:925)	at javax.swing.text.DefaultFormatter.install(DefaultFormatter.java:105)	at javax.swing.text.InternationalFormatter.install(InternationalFormatter.java:268)	at javax.swing.JFormattedTextField.setFormatter(JFormattedTextField.java:443)	at javax.swing.JFormattedTextField.setValue(JFormattedTextField.java:767)	at javax.swing.JFormattedTextField.setValue(JFormattedTextField.java:480)	at javax.swing.JSpinner$DefaultEditor.stateChanged(JSpinner.java:696)	at javax.swing.JSpinner.fireStateChanged(JSpinner.java:426)	at javax.swing.JSpinner$ModelListener.stateChanged(JSpinner.java:353)	at javax.swing.AbstractSpinnerModel.fireStateChanged(AbstractSpinnerModel.java:102)	at javax.swing.SpinnerNumberModel.setValue(SpinnerNumberModel.java:430)	at com.core.java_ui.pagesetup.OptionsTab$SpinnerDocumentListener.updateSpinner(OptionsTab.java:294)	at com.core.java_ui.pagesetup.OptionsTab$SpinnerDocumentListener.insertUpdate(OptionsTab.java:258)	at javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:184)	at javax.swing.text.AbstractDocument.handleInsertString(AbstractDocument.java:754)	at javax.swing.text.AbstractDocument.insertString(AbstractDocument.java:711)	at javax.swing.text.PlainDocument.insertString(PlainDocument.java:114)	at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:673)	at javax.swing.text.JTextComponent.setText(JTextComponent.java:1441)	at javax.swing.JFormattedTextField$AbstractFormatter.install(JFormattedTextField.java:925)	at javax.swing.text.DefaultFormatter.install(DefaultFormatter.java:105)	at javax.swing.text.InternationalFormatter.install(InternationalFormatter.java:268)	at javax.swing.JFormattedTextField.setFormatter(JFormattedTextField.java:443)	at javax.swing.JFormattedTextField.setValue(JFormattedTextField.java:767)	at javax.swing.JFormattedTextField.processFocusEvent(JFormattedTextField.java:614)	at java.awt.Component.processEvent(Component.java:5244)	at java.awt.Container.processEvent(Container.java:1966)	at java.awt.Component.dispatchEventImpl(Component.java:3955)	at java.awt.Container.dispatchEventImpl(Container.java:2024)	at java.awt.Component.dispatchEvent(Component.java:3803)	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810)	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:827)	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:478)	at java.awt.Component.dispatchEventImpl(Component.java:3841)	at java.awt.Container.dispatchEventImpl(Container.java:2024)	at java.awt.Component.dispatchEvent(Component.java:3803)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:234)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)