6b0dd10c5f230cc45c0202746ea7bf73a68b8d32,core/src/main/java/com/orientechnologies/orient/core/db/tool/ODatabaseImport.java,ODatabaseImport,removeDefaultClusters,#,551
Before Change
final OSchema schema = database.getMetadata().getSchema();
schema.dropClass(OUser.CLASS_NAME);
schema.dropClass(ORole.CLASS_NAME);
schema.dropClass(OSecurityShared.RESTRICTED_CLASSNAME);
schema.dropClass(OFunction.CLASS_NAME);
schema.dropClass(OMVRBTreeRIDProvider.PERSISTENT_CLASS_NAME);
After Change
final OSchema schema = database.getMetadata().getSchema();
if (schema.existsClass(OUser.CLASS_NAME))
schema.dropClass(OUser.CLASS_NAME);
if (schema.existsClass(ORole.CLASS_NAME))
schema.dropClass(ORole.CLASS_NAME);
if (schema.existsClass(OSecurityShared.RESTRICTED_CLASSNAME))
schema.dropClass(OSecurityShared.RESTRICTED_CLASSNAME);
if (schema.existsClass(OFunction.CLASS_NAME))