Maximum screen limits (&1 lines, &2 columns) exceeded

What happened?

When the screen was being read from the database, the system found that
one or several screen elements do not fit into the maximum screen area
of 200 lines and 255 columns.
Typically, this kind of constellation can occur when the screen field
has a reference to the Dictionary, but the respective Dictionary object
has meanwhile received a larger output length.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System activities

The system resets the determined values for the screen attributes
"Number of Occupied Lines/Columns" down from the maximum values 200 and
255 in order not to have to interrupt work in the Screen Painter.
This check is repeated in the Screen Painter each time the edit screen
changes. The message will possibly be sent several times.

How to fix this error?

Check immediately which screen fields go beyond the maximum allowed
screen area. Since the Layout Editor cannot fully display these screen
elements or even display them at all, switch to the element list. You
can also switch the the editing screen "Properties" and, if necessary,
increase the attributes "Maintain Lines/Columns" to increase the current
screen area.
If a screen field goes beyond the lower screen limit or even only begins
at a line with a line number > 200, then delete the screen field.
If a screen field goes beyond the right screen limit, you generally do
not need to delete it, but you can set the attribute "Scrollable" and
then reduce the displayed length.
Remember that working in the Layout Editor can be dangerous as long as
this error situation persists. Loss of data and systerm termination
cannot be fully avoided.

Error message extract from SAP system. Copyright SAP SE.