Downgrading from Xray 5.x.x to a previous version will have the following side-effects on Test Runs with dataset:

• Test parameters will no longer be converted on the Test Run page, this includes Test Step definitions and Pre-Conditions;
• When loading a Test Run created on version 5.x.x, the merge/reset message will be displayed;
• When merging a Test Run created on version 5.x.x with the new Test Step definition, all Test Step results will be updated but the reset/merge message will still be displayed;
• A Test Run created on version 5.x.x with iterations will be displayed in a "flat mode". The iterations will no longer be available and all the Test Step results from each iteration will be presented on the Test Steps section;
  
• After the downgrade, the integrity checker will fail on "Check for invalid Mementos" for all Test Runs created on version 5.x.x. We recommend running the integrity checker before downgrading to get rid of possible invalid mementos.