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org.eclipse.core.runtime.CoreException: Cannot modify a deleted project.	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.validateNotDeleted(FacetedProject.java:1863)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.setTargetedRuntimesInternal(FacetedProject.java:673)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChangesInternal(FacetedProject.java:1161)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.access$2(FacetedProject.java:1117)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject$5.run(FacetedProject.java:1099)	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2241)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProject.mergeChanges(FacetedProject.java:1109)	at org.eclipse.wst.common.project.facet.core.internal.FacetedProjectWorkingCopy.commitChanges(FacetedProjectWorkingCopy.java:2020)	at org.eclipse.wst.jsdt.web.core.internal.project.ConvertJob.runInWorkspace(ConvertJob.java:66)	at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:39)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)