title: why this error is coming i have not even started coding
body: <p>Multiple entries with same key: Google Inc.:Google APIs:19=Google APIs (Google Inc.) (API 19) and Google Inc.:Google APIs:19=Google APIs (Google Inc.) (API 19)</p>
  
  <p>java.lang.IllegalArgumentException: Multiple entries with same key: Google       Inc.:Google APIs:19=Google APIs (Google Inc.) (API 19) and Google Inc.:Google APIs:19=Google APIs (Google Inc.) (API 19)</p>
  
  <pre><code>at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:150)
  at com.google.common.collect.RegularImmutableBiMap.&lt;init&gt;(RegularImmutableBiMap.java:77)
  at com.google.common.collect.ImmutableBiMap$Builder.build(ImmutableBiMap.java:172)
  at com.android.tools.idea.gradle.structure.editors.KeyValuePane.&lt;init&gt;(KeyValuePane.java:134)
  at com.android.tools.idea.gradle.structure.editors.AndroidProjectConfigurable.&lt;init&gt;(AndroidProjectConfigurable.java:65)
  at com.android.tools.idea.gradle.structure.AndroidProjectStructureConfigurable.&lt;init&gt;(AndroidProjectStructureConfigurable.java:221)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
  at org.picocontainer.defaults.InstantiatingComponentAdapter.newInstance(InstantiatingComponentAdapter.java:193)
  at org.picocontainer.defaults.ConstructorInjectionComponentAdapter$1.run(ConstructorInjectionComponentAdapter.java:220)
  at org.picocontainer.defaults.ThreadLocalCyclicDependencyGuard.observe(ThreadLocalCyclicDependencyGuard.java:53)
  at org.picocontainer.defaults.ConstructorInjectionComponentAdapter.getComponentInstance(ConstructorInjectionComponentAdapter.java:248)
  at com.intellij.util.pico.ConstructorInjectionComponentAdapter.getComponentInstance(ConstructorInjectionComponentAdapter.java:58)
  at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter.initializeInstance(ServiceManagerImpl.java:228)
  at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter$1.compute(ServiceManagerImpl.java:216)
  at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:884)
  at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter.getComponentInstance(ServiceManagerImpl.java:207)
  at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:245)
  at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:211)
  at com.intellij.openapi.components.ServiceManager.getService(ServiceManager.java:37)
  at com.android.tools.idea.gradle.structure.AndroidProjectStructureConfigurable.getInstance(AndroidProjectStructureConfigurable.java:116)
  at com.android.tools.idea.gradle.structure.editors.AndroidProjectSettingsService.openAndSelectDependenciesEditor(AndroidProjectSettingsService.java:129)
  at com.android.tools.idea.gradle.actions.EditLibraryAndDependenciesAction.doPerform(EditLibraryAndDependenciesAction.java:38)
  at com.android.tools.idea.gradle.actions.AbstractProjectStructureAction.doPerform(AbstractProjectStructureAction.java:56)
  at com.android.tools.idea.gradle.actions.AndroidStudioGradleAction.actionPerformed(AndroidStudioGradleAction.java:65)
  at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:182)
  at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter$1.run(ActionMenuItem.java:312)
  at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:958)
  at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:124)
  at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:282)
  at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
  at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:109)
  at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:512)
  at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:44)
  at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:532)
  at java.awt.Component.processMouseEvent(Component.java:6525)
  at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
  at java.awt.Component.processEvent(Component.java:6290)
  at java.awt.Container.processEvent(Container.java:2234)
  at java.awt.Component.dispatchEventImpl(Component.java:4881)
  at java.awt.Container.dispatchEventImpl(Container.java:2292)
  at java.awt.Component.dispatchEvent(Component.java:4703)
  at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
  at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
  at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
  at java.awt.Container.dispatchEventImpl(Container.java:2278)
  at java.awt.Window.dispatchEventImpl(Window.java:2750)
  at java.awt.Component.dispatchEvent(Component.java:4703)
  at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:751)
  at java.awt.EventQueue.access$500(EventQueue.java:97)
  at java.awt.EventQueue$3.run(EventQueue.java:702)
  at java.awt.EventQueue$3.run(EventQueue.java:696)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
  at java.awt.EventQueue$4.run(EventQueue.java:724)
  at java.awt.EventQueue$4.run(EventQueue.java:722)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:721)
  at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:734)
  at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:565)
  at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:382)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
  </code></pre>