Kerbal Space Program

My Mobile Processing Lab has already over 700 units of data. Temperature measurement has value of 275 units science which could add 55 units of data to the Processing Lab. 55 data unit wouldn't fit, but in earlier KSP versions superfluous data could be added later and, when reviewed, they were displayed ad possible to add. Now, when reviewing data its value is "---" and the button is disabled. Is this data usable in the lab when some place is freed? I don't know but data displayed as worthless (EVA report could be transmitted but for the LAB still had a value) could discarded by the user. However, when data is discarded and read again - they have processing value again. Al long as are being viewed for the firs time. They should keep their value until utilized in the lab. Or the rules have changed.