Spreadsheets with barcodes in them will usually re-open with the barcodes expressed in scientific notation, like this:
To convert them into Text format, in a new column, apply the TRIM function to each value in the barcode column:
Because this new column is actually a calculation, it may not import correctly into DBeaver as a local table. Create a third column by copy/pasting the "fixed barcodes" column as "values" into a new column (in Paste, choose the icon that looks like a clipboard with 1-2-3 on it). You can then delete the other two columns.